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Set dynamic tag VMA and size from dynamic section when possible
[thirdparty/binutils-gdb.git] / bfd / elf32-s390.c
1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright (C) 2000-2016 Free Software Foundation, Inc.
3 Contributed by Carl B. Pedersen and Martin Schwidefsky.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
20 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf/s390.h"
28
29 static bfd_reloc_status_type
30 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
31 asection *, bfd *, char **);
32 static bfd_reloc_status_type
33 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
34 asection *, bfd *, char **);
35
36 /* The relocation "howto" table. */
37
38 static reloc_howto_type elf_howto_table[] =
39 {
40 HOWTO (R_390_NONE, /* type */
41 0, /* rightshift */
42 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
43 0, /* bitsize */
44 FALSE, /* pc_relative */
45 0, /* bitpos */
46 complain_overflow_dont, /* complain_on_overflow */
47 bfd_elf_generic_reloc, /* special_function */
48 "R_390_NONE", /* name */
49 FALSE, /* partial_inplace */
50 0, /* src_mask */
51 0, /* dst_mask */
52 FALSE), /* pcrel_offset */
53
54 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
55 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
56 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
57 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
58 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
59 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
60 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
61 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
62 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
63 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
64 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
65 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
66 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
67 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
68 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
69 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
70 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
71 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE),
72 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
73 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
74 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
75 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
76 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
77 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
78 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
79 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
80 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
81 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE),
82 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
83 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
84 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
85 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
86 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
87 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
88 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
89 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
90 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
91 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
92 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
93 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
94 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
95 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
96 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
97 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
98 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
99 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
100 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
101 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE),
102 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
103 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
104 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
105 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
106 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
107 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
108 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
109 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
110 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
111 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
112 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
113 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
114 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
115 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
116 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
118 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
119 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
120 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
121 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
122 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
123 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
124 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
125 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
127 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
128 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
129 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
130 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
131 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
132 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
133 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
134 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
135 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
136 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
137 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
138 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
139 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
140 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
141 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
142 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
143 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
144 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
145 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
146 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
147 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
148 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
149 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
150 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
151 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
152 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
153 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
154 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
155 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
156 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
157 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
158 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
159 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
160 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
161 HOWTO(R_390_IRELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
162 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, 0xffffffff, FALSE),
163 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
164 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
165 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
166 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
167 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
168 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
169 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
170 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
171 };
172
173 /* GNU extension to record C++ vtable hierarchy. */
174 static reloc_howto_type elf32_s390_vtinherit_howto =
175 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
176 static reloc_howto_type elf32_s390_vtentry_howto =
177 HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
178
179 static reloc_howto_type *
180 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
181 bfd_reloc_code_real_type code)
182 {
183 switch (code)
184 {
185 case BFD_RELOC_NONE:
186 return &elf_howto_table[(int) R_390_NONE];
187 case BFD_RELOC_8:
188 return &elf_howto_table[(int) R_390_8];
189 case BFD_RELOC_390_12:
190 return &elf_howto_table[(int) R_390_12];
191 case BFD_RELOC_16:
192 return &elf_howto_table[(int) R_390_16];
193 case BFD_RELOC_32:
194 return &elf_howto_table[(int) R_390_32];
195 case BFD_RELOC_CTOR:
196 return &elf_howto_table[(int) R_390_32];
197 case BFD_RELOC_32_PCREL:
198 return &elf_howto_table[(int) R_390_PC32];
199 case BFD_RELOC_390_GOT12:
200 return &elf_howto_table[(int) R_390_GOT12];
201 case BFD_RELOC_32_GOT_PCREL:
202 return &elf_howto_table[(int) R_390_GOT32];
203 case BFD_RELOC_390_PLT32:
204 return &elf_howto_table[(int) R_390_PLT32];
205 case BFD_RELOC_390_COPY:
206 return &elf_howto_table[(int) R_390_COPY];
207 case BFD_RELOC_390_GLOB_DAT:
208 return &elf_howto_table[(int) R_390_GLOB_DAT];
209 case BFD_RELOC_390_JMP_SLOT:
210 return &elf_howto_table[(int) R_390_JMP_SLOT];
211 case BFD_RELOC_390_RELATIVE:
212 return &elf_howto_table[(int) R_390_RELATIVE];
213 case BFD_RELOC_32_GOTOFF:
214 return &elf_howto_table[(int) R_390_GOTOFF32];
215 case BFD_RELOC_390_GOTPC:
216 return &elf_howto_table[(int) R_390_GOTPC];
217 case BFD_RELOC_390_GOT16:
218 return &elf_howto_table[(int) R_390_GOT16];
219 case BFD_RELOC_16_PCREL:
220 return &elf_howto_table[(int) R_390_PC16];
221 case BFD_RELOC_390_PC12DBL:
222 return &elf_howto_table[(int) R_390_PC12DBL];
223 case BFD_RELOC_390_PLT12DBL:
224 return &elf_howto_table[(int) R_390_PLT12DBL];
225 case BFD_RELOC_390_PC16DBL:
226 return &elf_howto_table[(int) R_390_PC16DBL];
227 case BFD_RELOC_390_PLT16DBL:
228 return &elf_howto_table[(int) R_390_PLT16DBL];
229 case BFD_RELOC_390_PC24DBL:
230 return &elf_howto_table[(int) R_390_PC24DBL];
231 case BFD_RELOC_390_PLT24DBL:
232 return &elf_howto_table[(int) R_390_PLT24DBL];
233 case BFD_RELOC_390_PC32DBL:
234 return &elf_howto_table[(int) R_390_PC32DBL];
235 case BFD_RELOC_390_PLT32DBL:
236 return &elf_howto_table[(int) R_390_PLT32DBL];
237 case BFD_RELOC_390_GOTPCDBL:
238 return &elf_howto_table[(int) R_390_GOTPCDBL];
239 case BFD_RELOC_390_GOTENT:
240 return &elf_howto_table[(int) R_390_GOTENT];
241 case BFD_RELOC_16_GOTOFF:
242 return &elf_howto_table[(int) R_390_GOTOFF16];
243 case BFD_RELOC_390_GOTPLT12:
244 return &elf_howto_table[(int) R_390_GOTPLT12];
245 case BFD_RELOC_390_GOTPLT16:
246 return &elf_howto_table[(int) R_390_GOTPLT16];
247 case BFD_RELOC_390_GOTPLT32:
248 return &elf_howto_table[(int) R_390_GOTPLT32];
249 case BFD_RELOC_390_GOTPLTENT:
250 return &elf_howto_table[(int) R_390_GOTPLTENT];
251 case BFD_RELOC_390_PLTOFF16:
252 return &elf_howto_table[(int) R_390_PLTOFF16];
253 case BFD_RELOC_390_PLTOFF32:
254 return &elf_howto_table[(int) R_390_PLTOFF32];
255 case BFD_RELOC_390_TLS_LOAD:
256 return &elf_howto_table[(int) R_390_TLS_LOAD];
257 case BFD_RELOC_390_TLS_GDCALL:
258 return &elf_howto_table[(int) R_390_TLS_GDCALL];
259 case BFD_RELOC_390_TLS_LDCALL:
260 return &elf_howto_table[(int) R_390_TLS_LDCALL];
261 case BFD_RELOC_390_TLS_GD32:
262 return &elf_howto_table[(int) R_390_TLS_GD32];
263 case BFD_RELOC_390_TLS_GOTIE12:
264 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
265 case BFD_RELOC_390_TLS_GOTIE32:
266 return &elf_howto_table[(int) R_390_TLS_GOTIE32];
267 case BFD_RELOC_390_TLS_LDM32:
268 return &elf_howto_table[(int) R_390_TLS_LDM32];
269 case BFD_RELOC_390_TLS_IE32:
270 return &elf_howto_table[(int) R_390_TLS_IE32];
271 case BFD_RELOC_390_TLS_IEENT:
272 return &elf_howto_table[(int) R_390_TLS_IEENT];
273 case BFD_RELOC_390_TLS_LE32:
274 return &elf_howto_table[(int) R_390_TLS_LE32];
275 case BFD_RELOC_390_TLS_LDO32:
276 return &elf_howto_table[(int) R_390_TLS_LDO32];
277 case BFD_RELOC_390_TLS_DTPMOD:
278 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
279 case BFD_RELOC_390_TLS_DTPOFF:
280 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
281 case BFD_RELOC_390_TLS_TPOFF:
282 return &elf_howto_table[(int) R_390_TLS_TPOFF];
283 case BFD_RELOC_390_20:
284 return &elf_howto_table[(int) R_390_20];
285 case BFD_RELOC_390_GOT20:
286 return &elf_howto_table[(int) R_390_GOT20];
287 case BFD_RELOC_390_GOTPLT20:
288 return &elf_howto_table[(int) R_390_GOTPLT20];
289 case BFD_RELOC_390_TLS_GOTIE20:
290 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
291 case BFD_RELOC_390_IRELATIVE:
292 return &elf_howto_table[(int) R_390_IRELATIVE];
293 case BFD_RELOC_VTABLE_INHERIT:
294 return &elf32_s390_vtinherit_howto;
295 case BFD_RELOC_VTABLE_ENTRY:
296 return &elf32_s390_vtentry_howto;
297 default:
298 break;
299 }
300 return 0;
301 }
302
303 static reloc_howto_type *
304 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
305 const char *r_name)
306 {
307 unsigned int i;
308
309 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
310 if (elf_howto_table[i].name != NULL
311 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
312 return &elf_howto_table[i];
313
314 if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0)
315 return &elf32_s390_vtinherit_howto;
316 if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0)
317 return &elf32_s390_vtentry_howto;
318
319 return NULL;
320 }
321
322 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
323 and elf32-s390.c has its own copy. */
324
325 static void
326 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
327 arelent *cache_ptr,
328 Elf_Internal_Rela *dst)
329 {
330 unsigned int r_type = ELF32_R_TYPE(dst->r_info);
331 switch (r_type)
332 {
333 case R_390_GNU_VTINHERIT:
334 cache_ptr->howto = &elf32_s390_vtinherit_howto;
335 break;
336
337 case R_390_GNU_VTENTRY:
338 cache_ptr->howto = &elf32_s390_vtentry_howto;
339 break;
340
341 default:
342 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
343 {
344 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
345 abfd, (int) r_type);
346 r_type = R_390_NONE;
347 }
348 cache_ptr->howto = &elf_howto_table[r_type];
349 }
350 }
351
352 /* A relocation function which doesn't do anything. */
353 static bfd_reloc_status_type
354 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
355 arelent *reloc_entry,
356 asymbol *symbol ATTRIBUTE_UNUSED,
357 void * data ATTRIBUTE_UNUSED,
358 asection *input_section,
359 bfd *output_bfd,
360 char **error_message ATTRIBUTE_UNUSED)
361 {
362 if (output_bfd)
363 reloc_entry->address += input_section->output_offset;
364 return bfd_reloc_ok;
365 }
366
367 /* Handle the large displacement relocs. */
368 static bfd_reloc_status_type
369 s390_elf_ldisp_reloc (bfd *abfd ATTRIBUTE_UNUSED,
370 arelent *reloc_entry,
371 asymbol *symbol,
372 void * data ATTRIBUTE_UNUSED,
373 asection *input_section,
374 bfd *output_bfd,
375 char **error_message ATTRIBUTE_UNUSED)
376 {
377 reloc_howto_type *howto = reloc_entry->howto;
378 bfd_vma relocation;
379 bfd_vma insn;
380
381 if (output_bfd != (bfd *) NULL
382 && (symbol->flags & BSF_SECTION_SYM) == 0
383 && (! howto->partial_inplace
384 || reloc_entry->addend == 0))
385 {
386 reloc_entry->address += input_section->output_offset;
387 return bfd_reloc_ok;
388 }
389
390 if (output_bfd != NULL)
391 return bfd_reloc_continue;
392
393 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
394 return bfd_reloc_outofrange;
395
396 relocation = (symbol->value
397 + symbol->section->output_section->vma
398 + symbol->section->output_offset);
399 relocation += reloc_entry->addend;
400 if (howto->pc_relative)
401 {
402 relocation -= (input_section->output_section->vma
403 + input_section->output_offset);
404 relocation -= reloc_entry->address;
405 }
406
407 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
408 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
409 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
410
411 if ((bfd_signed_vma) relocation < - 0x80000
412 || (bfd_signed_vma) relocation > 0x7ffff)
413 return bfd_reloc_overflow;
414 else
415 return bfd_reloc_ok;
416 }
417
418 static bfd_boolean
419 elf_s390_is_local_label_name (bfd *abfd, const char *name)
420 {
421 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
422 return TRUE;
423
424 return _bfd_elf_is_local_label_name (abfd, name);
425 }
426
427 /* Functions for the 390 ELF linker. */
428
429 /* The name of the dynamic interpreter. This is put in the .interp
430 section. */
431
432 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
433
434 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
435 copying dynamic variables from a shared lib into an app's dynbss
436 section, and instead use a dynamic relocation to point into the
437 shared lib. */
438 #define ELIMINATE_COPY_RELOCS 1
439
440 /* The size in bytes of the first entry in the procedure linkage table. */
441 #define PLT_FIRST_ENTRY_SIZE 32
442 /* The size in bytes of an entry in the procedure linkage table. */
443 #define PLT_ENTRY_SIZE 32
444
445 #define GOT_ENTRY_SIZE 4
446
447 #define RELA_ENTRY_SIZE sizeof (Elf32_External_Rela)
448
449 /* The first three entries in a procedure linkage table are reserved,
450 and the initial contents are unimportant (we zero them out).
451 Subsequent entries look like this. See the SVR4 ABI 386
452 supplement to see how this works. */
453
454 /* For the s390, simple addr offset can only be 0 - 4096.
455 To use the full 2 GB address space, several instructions
456 are needed to load an address in a register and execute
457 a branch( or just saving the address)
458
459 Furthermore, only r 0 and 1 are free to use!!! */
460
461 /* The first 3 words in the GOT are then reserved.
462 Word 0 is the address of the dynamic table.
463 Word 1 is a pointer to a structure describing the object
464 Word 2 is used to point to the loader entry address.
465
466 The code for position independent PLT entries looks like this:
467
468 r12 holds addr of the current GOT at entry to the PLT
469
470 The GOT holds the address in the PLT to be executed.
471 The loader then gets:
472 24(15) = Pointer to the structure describing the object.
473 28(15) = Offset into rela.plt
474
475 The loader must then find the module where the function is
476 and insert the address in the GOT.
477
478 Note: 390 can only address +- 64 K relative.
479 We check if offset > 65536, then make a relative branch -64xxx
480 back to a previous defined branch
481
482 PLT1: BASR 1,0 # 2 bytes
483 L 1,22(1) # 4 bytes Load offset in GOT in r 1
484 L 1,(1,12) # 4 bytes Load address from GOT in r1
485 BCR 15,1 # 2 bytes Jump to address
486 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
487 L 1,14(1) # 4 bytes Load offset in symol table in r1
488 BRC 15,-x # 4 bytes Jump to start of PLT
489 .word 0 # 2 bytes filler
490 .long ? # 4 bytes offset in GOT
491 .long ? # 4 bytes offset into rela.plt
492
493 This was the general case. There are two additional, optimizes PLT
494 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
495 First the one for GOT offsets < 4096:
496
497 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
498 BCR 15,1 # 2 bytes Jump to address
499 .word 0,0,0 # 6 bytes filler
500 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
501 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
502 BRC 15,-x # 4 bytes Jump to start of PLT
503 .word 0,0,0 # 6 bytes filler
504 .long ? # 4 bytes offset into rela.plt
505
506 Second the one for GOT offsets < 32768:
507
508 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
509 L 1,(1,12) # 4 bytes Load address from GOT to r1
510 BCR 15,1 # 2 bytes Jump to address
511 .word 0 # 2 bytes filler
512 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
513 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
514 BRC 15,-x # 4 bytes Jump to start of PLT
515 .word 0,0,0 # 6 bytes filler
516 .long ? # 4 bytes offset into rela.plt
517
518 Total = 32 bytes per PLT entry
519
520 The code for static build PLT entries looks like this:
521
522 PLT1: BASR 1,0 # 2 bytes
523 L 1,22(1) # 4 bytes Load address of GOT entry
524 L 1,0(0,1) # 4 bytes Load address from GOT in r1
525 BCR 15,1 # 2 bytes Jump to address
526 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
527 L 1,14(1) # 4 bytes Load offset in symbol table in r1
528 BRC 15,-x # 4 bytes Jump to start of PLT
529 .word 0 # 2 bytes filler
530 .long ? # 4 bytes address of GOT entry
531 .long ? # 4 bytes offset into rela.plt */
532
533 static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] =
534 {
535 0x0d, 0x10, /* basr %r1,%r0 */
536 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
537 0x58, 0x10, 0x10, 0x00, /* l %r1,0(%r1) */
538 0x07, 0xf1, /* br %r1 */
539 0x0d, 0x10, /* basr %r1,%r0 */
540 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
541 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
542 0x00, 0x00, /* padding */
543 0x00, 0x00, 0x00, 0x00, /* GOT offset */
544 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
545 };
546
547 /* Generic PLT pic entry. */
548 static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] =
549 {
550 0x0d, 0x10, /* basr %r1,%r0 */
551 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
552 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
553 0x07, 0xf1, /* br %r1 */
554 0x0d, 0x10, /* basr %r1,%r0 */
555 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
556 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
557 0x00, 0x00, /* padding */
558 0x00, 0x00, 0x00, 0x00, /* GOT offset */
559 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
560 };
561
562 /* Optimized PLT pic entry for GOT offset < 4k. xx will be replaced
563 when generating the PLT slot with the GOT offset. */
564 static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] =
565 {
566 0x58, 0x10, 0xc0, 0x00, /* l %r1,xx(%r12) */
567 0x07, 0xf1, /* br %r1 */
568 0x00, 0x00, 0x00, 0x00, /* padding */
569 0x00, 0x00,
570 0x0d, 0x10, /* basr %r1,%r0 */
571 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
572 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
573 0x00, 0x00, 0x00, 0x00,
574 0x00, 0x00, 0x00, 0x00
575 };
576
577 /* Optimized PLT pic entry for GOT offset < 32k. xx will be replaced
578 when generating the PLT slot with the GOT offset. */
579 static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] =
580 {
581 0xa7, 0x18, 0x00, 0x00, /* lhi %r1,xx */
582 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
583 0x07, 0xf1, /* br %r1 */
584 0x00, 0x00,
585 0x0d, 0x10, /* basr %r1,%r0 */
586 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
587 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
588 0x00, 0x00, 0x00, 0x00,
589 0x00, 0x00, 0x00, 0x00,
590 0x00, 0x00
591 };
592
593 /* The first PLT entry pushes the offset into the rela.plt
594 from R1 onto the stack at 8(15) and the loader object info
595 at 12(15), loads the loader address in R1 and jumps to it. */
596
597 /* The first entry in the PLT for PIC code:
598
599 PLT0:
600 ST 1,28(15) # R1 has offset into rela.plt
601 L 1,4(12) # Get loader ino(object struct address)
602 ST 1,24(15) # Store address
603 L 1,8(12) # Entry address of loader in R1
604 BR 1 # Jump to loader
605
606 The first entry in the PLT for static code:
607
608 PLT0:
609 ST 1,28(15) # R1 has offset into rela.plt
610 BASR 1,0
611 L 1,18(0,1) # Get address of GOT
612 MVC 24(4,15),4(1) # Move loader ino to stack
613 L 1,8(1) # Get address of loader
614 BR 1 # Jump to loader
615 .word 0 # filler
616 .long got # address of GOT */
617
618 static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] =
619 {
620 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
621 0x0d, 0x10, /* basr %r1,%r0 */
622 0x58, 0x10, 0x10, 0x12, /* l %r1,18(%r1) */
623 0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, /* mvc 24(4,%r15),4(%r1) */
624 0x58, 0x10, 0x10, 0x08, /* l %r1,8(%r1) */
625 0x07, 0xf1, /* br %r1 */
626 0x00, 0x00, 0x00, 0x00,
627 0x00, 0x00, 0x00, 0x00,
628 0x00, 0x00
629 };
630
631 static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] =
632 {
633 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
634 0x58, 0x10, 0xc0, 0x04, /* l %r1,4(%r12) */
635 0x50, 0x10, 0xf0, 0x18, /* st %r1,24(%r15) */
636 0x58, 0x10, 0xc0, 0x08, /* l %r1,8(%r12) */
637 0x07, 0xf1, /* br %r1 */
638 0x00, 0x00, 0x00, 0x00,
639 0x00, 0x00, 0x00, 0x00,
640 0x00, 0x00, 0x00, 0x00,
641 0x00, 0x00
642 };
643
644
645 /* s390 ELF linker hash entry. */
646
647 struct elf_s390_link_hash_entry
648 {
649 struct elf_link_hash_entry elf;
650
651 /* Track dynamic relocs copied for this symbol. */
652 struct elf_dyn_relocs *dyn_relocs;
653
654 /* Number of GOTPLT references for a function. */
655 bfd_signed_vma gotplt_refcount;
656
657 #define GOT_UNKNOWN 0
658 #define GOT_NORMAL 1
659 #define GOT_TLS_GD 2
660 #define GOT_TLS_IE 3
661 #define GOT_TLS_IE_NLT 4
662 unsigned char tls_type;
663
664 /* For pointer equality reasons we might need to change the symbol
665 type from STT_GNU_IFUNC to STT_FUNC together with its value and
666 section entry. So after alloc_dynrelocs only these values should
667 be used. In order to check whether a symbol is IFUNC use
668 s390_is_ifunc_symbol_p. */
669 bfd_vma ifunc_resolver_address;
670 asection *ifunc_resolver_section;
671 };
672
673 #define elf_s390_hash_entry(ent) \
674 ((struct elf_s390_link_hash_entry *)(ent))
675
676 /* This structure represents an entry in the local PLT list needed for
677 local IFUNC symbols. */
678 struct plt_entry
679 {
680 /* The section of the local symbol.
681 Set in relocate_section and used in finish_dynamic_sections. */
682 asection *sec;
683
684 union
685 {
686 bfd_signed_vma refcount;
687 bfd_vma offset;
688 } plt;
689 };
690
691 /* NOTE: Keep this structure in sync with
692 the one declared in elf64-s390.c. */
693 struct elf_s390_obj_tdata
694 {
695 struct elf_obj_tdata root;
696
697 /* A local PLT is needed for ifunc symbols. */
698 struct plt_entry *local_plt;
699
700 /* TLS type for each local got entry. */
701 char *local_got_tls_type;
702 };
703
704 #define elf_s390_tdata(abfd) \
705 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
706
707 #define elf_s390_local_plt(abfd) \
708 (elf_s390_tdata (abfd)->local_plt)
709
710 #define elf_s390_local_got_tls_type(abfd) \
711 (elf_s390_tdata (abfd)->local_got_tls_type)
712
713 #define is_s390_elf(bfd) \
714 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
715 && elf_tdata (bfd) != NULL \
716 && elf_object_id (bfd) == S390_ELF_DATA)
717
718 static bfd_boolean
719 elf_s390_mkobject (bfd *abfd)
720 {
721 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
722 S390_ELF_DATA);
723 }
724
725 static bfd_boolean
726 elf_s390_object_p (bfd *abfd)
727 {
728 /* Set the right machine number for an s390 elf32 file. */
729 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
730 }
731
732 /* s390 ELF linker hash table. */
733
734 struct elf_s390_link_hash_table
735 {
736 struct elf_link_hash_table elf;
737
738 /* Short-cuts to get to dynamic linker sections. */
739 asection *sdynbss;
740 asection *srelbss;
741 asection *irelifunc;
742
743 union
744 {
745 bfd_signed_vma refcount;
746 bfd_vma offset;
747 } tls_ldm_got;
748
749 /* Small local sym cache. */
750 struct sym_cache sym_cache;
751 };
752
753 /* Get the s390 ELF linker hash table from a link_info structure. */
754
755 #define elf_s390_hash_table(p) \
756 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
757 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
758
759 #undef ELF64
760 #include "elf-s390-common.c"
761
762 /* Create an entry in an s390 ELF linker hash table. */
763
764 static struct bfd_hash_entry *
765 link_hash_newfunc (struct bfd_hash_entry *entry,
766 struct bfd_hash_table *table,
767 const char *string)
768 {
769 /* Allocate the structure if it has not already been allocated by a
770 subclass. */
771 if (entry == NULL)
772 {
773 entry = bfd_hash_allocate (table,
774 sizeof (struct elf_s390_link_hash_entry));
775 if (entry == NULL)
776 return entry;
777 }
778
779 /* Call the allocation method of the superclass. */
780 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
781 if (entry != NULL)
782 {
783 struct elf_s390_link_hash_entry *eh;
784
785 eh = (struct elf_s390_link_hash_entry *) entry;
786 eh->dyn_relocs = NULL;
787 eh->gotplt_refcount = 0;
788 eh->tls_type = GOT_UNKNOWN;
789 eh->ifunc_resolver_address = 0;
790 eh->ifunc_resolver_section = NULL;
791 }
792
793 return entry;
794 }
795
796 /* Create an s390 ELF linker hash table. */
797
798 static struct bfd_link_hash_table *
799 elf_s390_link_hash_table_create (bfd *abfd)
800 {
801 struct elf_s390_link_hash_table *ret;
802 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
803
804 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
805 if (ret == NULL)
806 return NULL;
807
808 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
809 sizeof (struct elf_s390_link_hash_entry),
810 S390_ELF_DATA))
811 {
812 free (ret);
813 return NULL;
814 }
815
816 return &ret->elf.root;
817 }
818
819 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
820 shortcuts to them in our hash table. */
821
822 static bfd_boolean
823 create_got_section (bfd *dynobj, struct bfd_link_info *info)
824 {
825 struct elf_s390_link_hash_table *htab;
826
827 if (! _bfd_elf_create_got_section (dynobj, info))
828 return FALSE;
829
830 htab = elf_s390_hash_table (info);
831 htab->elf.sgot = bfd_get_linker_section (dynobj, ".got");
832 htab->elf.sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
833 htab->elf.srelgot = bfd_get_linker_section (dynobj, ".rela.got");
834 if (!htab->elf.sgot || !htab->elf.sgotplt || !htab->elf.srelgot)
835 abort ();
836
837 return TRUE;
838 }
839
840 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
841 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
842 hash table. */
843
844 static bfd_boolean
845 elf_s390_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
846 {
847 struct elf_s390_link_hash_table *htab;
848
849 htab = elf_s390_hash_table (info);
850 if (!htab->elf.sgot && !create_got_section (dynobj, info))
851 return FALSE;
852
853 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
854 return FALSE;
855
856 htab->elf.splt = bfd_get_linker_section (dynobj, ".plt");
857 htab->elf.srelplt = bfd_get_linker_section (dynobj, ".rela.plt");
858 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
859 if (!bfd_link_pic (info))
860 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
861
862 if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss
863 || (!bfd_link_pic (info) && !htab->srelbss))
864 abort ();
865
866 return TRUE;
867 }
868
869 /* Copy the extra info we tack onto an elf_link_hash_entry. */
870
871 static void
872 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
873 struct elf_link_hash_entry *dir,
874 struct elf_link_hash_entry *ind)
875 {
876 struct elf_s390_link_hash_entry *edir, *eind;
877
878 edir = (struct elf_s390_link_hash_entry *) dir;
879 eind = (struct elf_s390_link_hash_entry *) ind;
880
881 if (eind->dyn_relocs != NULL)
882 {
883 if (edir->dyn_relocs != NULL)
884 {
885 struct elf_dyn_relocs **pp;
886 struct elf_dyn_relocs *p;
887
888 /* Add reloc counts against the indirect sym to the direct sym
889 list. Merge any entries against the same section. */
890 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
891 {
892 struct elf_dyn_relocs *q;
893
894 for (q = edir->dyn_relocs; q != NULL; q = q->next)
895 if (q->sec == p->sec)
896 {
897 q->pc_count += p->pc_count;
898 q->count += p->count;
899 *pp = p->next;
900 break;
901 }
902 if (q == NULL)
903 pp = &p->next;
904 }
905 *pp = edir->dyn_relocs;
906 }
907
908 edir->dyn_relocs = eind->dyn_relocs;
909 eind->dyn_relocs = NULL;
910 }
911
912 if (ind->root.type == bfd_link_hash_indirect
913 && dir->got.refcount <= 0)
914 {
915 edir->tls_type = eind->tls_type;
916 eind->tls_type = GOT_UNKNOWN;
917 }
918
919 if (ELIMINATE_COPY_RELOCS
920 && ind->root.type != bfd_link_hash_indirect
921 && dir->dynamic_adjusted)
922 {
923 /* If called to transfer flags for a weakdef during processing
924 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
925 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
926 dir->ref_dynamic |= ind->ref_dynamic;
927 dir->ref_regular |= ind->ref_regular;
928 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
929 dir->needs_plt |= ind->needs_plt;
930 }
931 else
932 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
933 }
934
935 static int
936 elf_s390_tls_transition (struct bfd_link_info *info,
937 int r_type,
938 int is_local)
939 {
940 if (bfd_link_pic (info))
941 return r_type;
942
943 switch (r_type)
944 {
945 case R_390_TLS_GD32:
946 case R_390_TLS_IE32:
947 if (is_local)
948 return R_390_TLS_LE32;
949 return R_390_TLS_IE32;
950 case R_390_TLS_GOTIE32:
951 if (is_local)
952 return R_390_TLS_LE32;
953 return R_390_TLS_GOTIE32;
954 case R_390_TLS_LDM32:
955 return R_390_TLS_LE32;
956 }
957
958 return r_type;
959 }
960
961 /* Look through the relocs for a section during the first phase, and
962 allocate space in the global offset table or procedure linkage
963 table. */
964
965 static bfd_boolean
966 elf_s390_check_relocs (bfd *abfd,
967 struct bfd_link_info *info,
968 asection *sec,
969 const Elf_Internal_Rela *relocs)
970 {
971 struct elf_s390_link_hash_table *htab;
972 Elf_Internal_Shdr *symtab_hdr;
973 struct elf_link_hash_entry **sym_hashes;
974 const Elf_Internal_Rela *rel;
975 const Elf_Internal_Rela *rel_end;
976 asection *sreloc;
977 bfd_signed_vma *local_got_refcounts;
978 int tls_type, old_tls_type;
979 Elf_Internal_Sym *isym;
980
981 if (bfd_link_relocatable (info))
982 return TRUE;
983
984 BFD_ASSERT (is_s390_elf (abfd));
985
986 htab = elf_s390_hash_table (info);
987 symtab_hdr = &elf_symtab_hdr (abfd);
988 sym_hashes = elf_sym_hashes (abfd);
989 local_got_refcounts = elf_local_got_refcounts (abfd);
990
991 sreloc = NULL;
992
993 rel_end = relocs + sec->reloc_count;
994 for (rel = relocs; rel < rel_end; rel++)
995 {
996 unsigned int r_type;
997 unsigned long r_symndx;
998 struct elf_link_hash_entry *h;
999
1000 r_symndx = ELF32_R_SYM (rel->r_info);
1001
1002 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1003 {
1004 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1005 abfd, r_symndx);
1006 return FALSE;
1007 }
1008
1009 if (r_symndx < symtab_hdr->sh_info)
1010 {
1011 /* A local symbol. */
1012 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1013 abfd, r_symndx);
1014 if (isym == NULL)
1015 return FALSE;
1016
1017 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1018 {
1019 struct plt_entry *plt;
1020
1021 if (htab->elf.dynobj == NULL)
1022 htab->elf.dynobj = abfd;
1023
1024 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1025 return FALSE;
1026
1027 if (local_got_refcounts == NULL)
1028 {
1029 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1030 return FALSE;
1031 local_got_refcounts = elf_local_got_refcounts (abfd);
1032 }
1033 plt = elf_s390_local_plt (abfd);
1034 plt[r_symndx].plt.refcount++;
1035 }
1036 h = NULL;
1037 }
1038 else
1039 {
1040 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1041 while (h->root.type == bfd_link_hash_indirect
1042 || h->root.type == bfd_link_hash_warning)
1043 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1044
1045 /* PR15323, ref flags aren't set for references in the same
1046 object. */
1047 h->root.non_ir_ref = 1;
1048 }
1049
1050 /* Create got section and local_got_refcounts array if they
1051 are needed. */
1052 r_type = elf_s390_tls_transition (info,
1053 ELF32_R_TYPE (rel->r_info),
1054 h == NULL);
1055 switch (r_type)
1056 {
1057 case R_390_GOT12:
1058 case R_390_GOT16:
1059 case R_390_GOT20:
1060 case R_390_GOT32:
1061 case R_390_GOTENT:
1062 case R_390_GOTPLT12:
1063 case R_390_GOTPLT16:
1064 case R_390_GOTPLT20:
1065 case R_390_GOTPLT32:
1066 case R_390_GOTPLTENT:
1067 case R_390_TLS_GD32:
1068 case R_390_TLS_GOTIE12:
1069 case R_390_TLS_GOTIE20:
1070 case R_390_TLS_GOTIE32:
1071 case R_390_TLS_IEENT:
1072 case R_390_TLS_IE32:
1073 case R_390_TLS_LDM32:
1074 if (h == NULL
1075 && local_got_refcounts == NULL)
1076 {
1077 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1078 return FALSE;
1079 local_got_refcounts = elf_local_got_refcounts (abfd);
1080 }
1081 /* Fall through. */
1082 case R_390_GOTOFF16:
1083 case R_390_GOTOFF32:
1084 case R_390_GOTPC:
1085 case R_390_GOTPCDBL:
1086 if (htab->elf.sgot == NULL)
1087 {
1088 if (htab->elf.dynobj == NULL)
1089 htab->elf.dynobj = abfd;
1090 if (!create_got_section (htab->elf.dynobj, info))
1091 return FALSE;
1092 }
1093 }
1094
1095 if (h != NULL)
1096 {
1097 if (htab->elf.dynobj == NULL)
1098 htab->elf.dynobj = abfd;
1099 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1100 return FALSE;
1101
1102 /* Make sure an IFUNC symbol defined in a non-shared object
1103 always gets a PLT slot. */
1104 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1105 {
1106 /* The symbol is called by the dynamic loader in order
1107 to resolve the relocation. So it is in fact also
1108 referenced. */
1109 h->ref_regular = 1;
1110 h->needs_plt = 1;
1111 }
1112 }
1113 switch (r_type)
1114 {
1115 case R_390_GOTPC:
1116 case R_390_GOTPCDBL:
1117 /* These relocs do not need a GOT slot. They just load the
1118 GOT pointer itself or address something else relative to
1119 the GOT. Since the GOT pointer has been set up above we
1120 are done. */
1121 break;
1122 case R_390_GOTOFF16:
1123 case R_390_GOTOFF32:
1124 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1125 break;
1126
1127 case R_390_PLT12DBL:
1128 case R_390_PLT16DBL:
1129 case R_390_PLT24DBL:
1130 case R_390_PLT32DBL:
1131 case R_390_PLT32:
1132 case R_390_PLTOFF16:
1133 case R_390_PLTOFF32:
1134 /* This symbol requires a procedure linkage table entry. We
1135 actually build the entry in adjust_dynamic_symbol,
1136 because this might be a case of linking PIC code which is
1137 never referenced by a dynamic object, in which case we
1138 don't need to generate a procedure linkage table entry
1139 after all. */
1140
1141 /* If this is a local symbol, we resolve it directly without
1142 creating a procedure linkage table entry. */
1143 if (h != NULL)
1144 {
1145 h->needs_plt = 1;
1146 h->plt.refcount += 1;
1147 }
1148 break;
1149
1150 case R_390_GOTPLT12:
1151 case R_390_GOTPLT16:
1152 case R_390_GOTPLT20:
1153 case R_390_GOTPLT32:
1154 case R_390_GOTPLTENT:
1155 /* This symbol requires either a procedure linkage table entry
1156 or an entry in the local got. We actually build the entry
1157 in adjust_dynamic_symbol because whether this is really a
1158 global reference can change and with it the fact if we have
1159 to create a plt entry or a local got entry. To be able to
1160 make a once global symbol a local one we have to keep track
1161 of the number of gotplt references that exist for this
1162 symbol. */
1163 if (h != NULL)
1164 {
1165 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1166 h->needs_plt = 1;
1167 h->plt.refcount += 1;
1168 }
1169 else
1170 local_got_refcounts[r_symndx] += 1;
1171 break;
1172
1173 case R_390_TLS_LDM32:
1174 htab->tls_ldm_got.refcount += 1;
1175 break;
1176
1177 case R_390_TLS_IE32:
1178 case R_390_TLS_GOTIE12:
1179 case R_390_TLS_GOTIE20:
1180 case R_390_TLS_GOTIE32:
1181 case R_390_TLS_IEENT:
1182 if (bfd_link_pic (info))
1183 info->flags |= DF_STATIC_TLS;
1184 /* Fall through. */
1185
1186 case R_390_GOT12:
1187 case R_390_GOT16:
1188 case R_390_GOT20:
1189 case R_390_GOT32:
1190 case R_390_GOTENT:
1191 case R_390_TLS_GD32:
1192 /* This symbol requires a global offset table entry. */
1193 switch (r_type)
1194 {
1195 default:
1196 case R_390_GOT12:
1197 case R_390_GOT16:
1198 case R_390_GOT20:
1199 case R_390_GOT32:
1200 case R_390_GOTENT:
1201 tls_type = GOT_NORMAL;
1202 break;
1203 case R_390_TLS_GD32:
1204 tls_type = GOT_TLS_GD;
1205 break;
1206 case R_390_TLS_IE32:
1207 case R_390_TLS_GOTIE32:
1208 tls_type = GOT_TLS_IE;
1209 break;
1210 case R_390_TLS_GOTIE12:
1211 case R_390_TLS_GOTIE20:
1212 case R_390_TLS_IEENT:
1213 tls_type = GOT_TLS_IE_NLT;
1214 break;
1215 }
1216
1217 if (h != NULL)
1218 {
1219 h->got.refcount += 1;
1220 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1221 }
1222 else
1223 {
1224 local_got_refcounts[r_symndx] += 1;
1225 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1226 }
1227 /* If a TLS symbol is accessed using IE at least once,
1228 there is no point to use dynamic model for it. */
1229 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1230 {
1231 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1232 {
1233 (*_bfd_error_handler)
1234 (_("%B: `%s' accessed both as normal and thread local symbol"),
1235 abfd, h->root.root.string);
1236 return FALSE;
1237 }
1238 if (old_tls_type > tls_type)
1239 tls_type = old_tls_type;
1240 }
1241
1242 if (old_tls_type != tls_type)
1243 {
1244 if (h != NULL)
1245 elf_s390_hash_entry (h)->tls_type = tls_type;
1246 else
1247 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1248 }
1249
1250 if (r_type != R_390_TLS_IE32)
1251 break;
1252 /* Fall through. */
1253
1254 case R_390_TLS_LE32:
1255 /* For static linking and executables this reloc will be
1256 calculated at linktime otherwise a TLS_TPOFF runtime
1257 reloc will be generated. */
1258 if (r_type == R_390_TLS_LE32 && bfd_link_pie (info))
1259 break;
1260
1261 if (!bfd_link_pic (info))
1262 break;
1263 info->flags |= DF_STATIC_TLS;
1264 /* Fall through. */
1265
1266 case R_390_8:
1267 case R_390_16:
1268 case R_390_32:
1269 case R_390_PC16:
1270 case R_390_PC12DBL:
1271 case R_390_PC16DBL:
1272 case R_390_PC24DBL:
1273 case R_390_PC32DBL:
1274 case R_390_PC32:
1275 if (h != NULL && bfd_link_executable (info))
1276 {
1277 /* If this reloc is in a read-only section, we might
1278 need a copy reloc. We can't check reliably at this
1279 stage whether the section is read-only, as input
1280 sections have not yet been mapped to output sections.
1281 Tentatively set the flag for now, and correct in
1282 adjust_dynamic_symbol. */
1283 h->non_got_ref = 1;
1284
1285 if (!bfd_link_pic (info))
1286 {
1287 /* We may need a .plt entry if the function this reloc
1288 refers to is in a shared lib. */
1289 h->plt.refcount += 1;
1290 }
1291 }
1292
1293 /* If we are creating a shared library, and this is a reloc
1294 against a global symbol, or a non PC relative reloc
1295 against a local symbol, then we need to copy the reloc
1296 into the shared library. However, if we are linking with
1297 -Bsymbolic, we do not need to copy a reloc against a
1298 global symbol which is defined in an object we are
1299 including in the link (i.e., DEF_REGULAR is set). At
1300 this point we have not seen all the input files, so it is
1301 possible that DEF_REGULAR is not set now but will be set
1302 later (it is never cleared). In case of a weak definition,
1303 DEF_REGULAR may be cleared later by a strong definition in
1304 a shared library. We account for that possibility below by
1305 storing information in the relocs_copied field of the hash
1306 table entry. A similar situation occurs when creating
1307 shared libraries and symbol visibility changes render the
1308 symbol local.
1309
1310 If on the other hand, we are creating an executable, we
1311 may need to keep relocations for symbols satisfied by a
1312 dynamic library if we manage to avoid copy relocs for the
1313 symbol. */
1314 if ((bfd_link_pic (info)
1315 && (sec->flags & SEC_ALLOC) != 0
1316 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1317 && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL
1318 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1319 && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL
1320 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1321 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1322 || (h != NULL
1323 && (! SYMBOLIC_BIND (info, h)
1324 || h->root.type == bfd_link_hash_defweak
1325 || !h->def_regular))))
1326 || (ELIMINATE_COPY_RELOCS
1327 && !bfd_link_pic (info)
1328 && (sec->flags & SEC_ALLOC) != 0
1329 && h != NULL
1330 && (h->root.type == bfd_link_hash_defweak
1331 || !h->def_regular)))
1332 {
1333 struct elf_dyn_relocs *p;
1334 struct elf_dyn_relocs **head;
1335
1336 /* We must copy these reloc types into the output file.
1337 Create a reloc section in dynobj and make room for
1338 this reloc. */
1339 if (sreloc == NULL)
1340 {
1341 if (htab->elf.dynobj == NULL)
1342 htab->elf.dynobj = abfd;
1343
1344 sreloc = _bfd_elf_make_dynamic_reloc_section
1345 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1346
1347 if (sreloc == NULL)
1348 return FALSE;
1349 }
1350
1351 /* If this is a global symbol, we count the number of
1352 relocations we need for this symbol. */
1353 if (h != NULL)
1354 {
1355 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1356 }
1357 else
1358 {
1359 /* Track dynamic relocs needed for local syms too.
1360 We really need local syms available to do this
1361 easily. Oh well. */
1362 asection *s;
1363 void *vpp;
1364
1365 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1366 abfd, r_symndx);
1367 if (isym == NULL)
1368 return FALSE;
1369
1370 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1371 if (s == NULL)
1372 s = sec;
1373
1374 vpp = &elf_section_data (s)->local_dynrel;
1375 head = (struct elf_dyn_relocs **) vpp;
1376 }
1377
1378 p = *head;
1379 if (p == NULL || p->sec != sec)
1380 {
1381 bfd_size_type amt = sizeof *p;
1382
1383 p = ((struct elf_dyn_relocs *)
1384 bfd_alloc (htab->elf.dynobj, amt));
1385 if (p == NULL)
1386 return FALSE;
1387 p->next = *head;
1388 *head = p;
1389 p->sec = sec;
1390 p->count = 0;
1391 p->pc_count = 0;
1392 }
1393
1394 p->count += 1;
1395 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1396 || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL
1397 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1398 || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL
1399 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1400 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1401 p->pc_count += 1;
1402 }
1403 break;
1404
1405 /* This relocation describes the C++ object vtable hierarchy.
1406 Reconstruct it for later use during GC. */
1407 case R_390_GNU_VTINHERIT:
1408 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1409 return FALSE;
1410 break;
1411
1412 /* This relocation describes which C++ vtable entries are actually
1413 used. Record for later use during GC. */
1414 case R_390_GNU_VTENTRY:
1415 BFD_ASSERT (h != NULL);
1416 if (h != NULL
1417 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1418 return FALSE;
1419 break;
1420
1421 default:
1422 break;
1423 }
1424 }
1425
1426 return TRUE;
1427 }
1428
1429 /* Return the section that should be marked against GC for a given
1430 relocation. */
1431
1432 static asection *
1433 elf_s390_gc_mark_hook (asection *sec,
1434 struct bfd_link_info *info,
1435 Elf_Internal_Rela *rel,
1436 struct elf_link_hash_entry *h,
1437 Elf_Internal_Sym *sym)
1438 {
1439 if (h != NULL)
1440 switch (ELF32_R_TYPE (rel->r_info))
1441 {
1442 case R_390_GNU_VTINHERIT:
1443 case R_390_GNU_VTENTRY:
1444 return NULL;
1445 }
1446 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1447
1448 }
1449
1450 /* Update the got entry reference counts for the section being removed. */
1451
1452 static bfd_boolean
1453 elf_s390_gc_sweep_hook (bfd *abfd,
1454 struct bfd_link_info *info,
1455 asection *sec,
1456 const Elf_Internal_Rela *relocs)
1457 {
1458 struct elf_s390_link_hash_table *htab;
1459 Elf_Internal_Shdr *symtab_hdr;
1460 struct elf_link_hash_entry **sym_hashes;
1461 bfd_signed_vma *local_got_refcounts;
1462 const Elf_Internal_Rela *rel, *relend;
1463
1464 if (bfd_link_relocatable (info))
1465 return TRUE;
1466
1467 htab = elf_s390_hash_table (info);
1468 if (htab == NULL)
1469 return FALSE;
1470
1471 elf_section_data (sec)->local_dynrel = NULL;
1472
1473 symtab_hdr = &elf_symtab_hdr (abfd);
1474 sym_hashes = elf_sym_hashes (abfd);
1475 local_got_refcounts = elf_local_got_refcounts (abfd);
1476
1477 relend = relocs + sec->reloc_count;
1478 for (rel = relocs; rel < relend; rel++)
1479 {
1480 unsigned long r_symndx;
1481 unsigned int r_type;
1482 struct elf_link_hash_entry *h = NULL;
1483
1484 r_symndx = ELF32_R_SYM (rel->r_info);
1485 if (r_symndx >= symtab_hdr->sh_info)
1486 {
1487 struct elf_s390_link_hash_entry *eh;
1488 struct elf_dyn_relocs **pp;
1489 struct elf_dyn_relocs *p;
1490
1491 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1492 while (h->root.type == bfd_link_hash_indirect
1493 || h->root.type == bfd_link_hash_warning)
1494 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1495 eh = (struct elf_s390_link_hash_entry *) h;
1496
1497 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1498 if (p->sec == sec)
1499 {
1500 /* Everything must go for SEC. */
1501 *pp = p->next;
1502 break;
1503 }
1504 }
1505 else
1506 {
1507 Elf_Internal_Sym *isym;
1508
1509 /* A local symbol. */
1510 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1511 abfd, r_symndx);
1512 if (isym == NULL)
1513 return FALSE;
1514
1515 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1516 {
1517 struct plt_entry *plt = elf_s390_local_plt (abfd);
1518 if (plt[r_symndx].plt.refcount > 0)
1519 plt[r_symndx].plt.refcount--;
1520 }
1521 }
1522
1523 r_type = ELF32_R_TYPE (rel->r_info);
1524 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1525 switch (r_type)
1526 {
1527 case R_390_TLS_LDM32:
1528 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1529 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1530 break;
1531
1532 case R_390_GOTOFF16:
1533 case R_390_GOTOFF32:
1534 if (h != NULL && s390_is_ifunc_symbol_p (h) && h->def_regular)
1535 {
1536 h->plt.refcount--;
1537 break;
1538 }
1539
1540 case R_390_GOTPC:
1541 case R_390_GOTPCDBL:
1542 break;
1543
1544 case R_390_TLS_GD32:
1545 case R_390_TLS_IE32:
1546 case R_390_TLS_GOTIE12:
1547 case R_390_TLS_GOTIE20:
1548 case R_390_TLS_GOTIE32:
1549 case R_390_TLS_IEENT:
1550 case R_390_GOT12:
1551 case R_390_GOT16:
1552 case R_390_GOT20:
1553 case R_390_GOT32:
1554 case R_390_GOTENT:
1555 if (h != NULL)
1556 {
1557 if (h->got.refcount > 0)
1558 h->got.refcount -= 1;
1559 }
1560 else if (local_got_refcounts != NULL)
1561 {
1562 if (local_got_refcounts[r_symndx] > 0)
1563 local_got_refcounts[r_symndx] -= 1;
1564 }
1565 break;
1566
1567 case R_390_8:
1568 case R_390_12:
1569 case R_390_16:
1570 case R_390_20:
1571 case R_390_32:
1572 case R_390_PC16:
1573 case R_390_PC12DBL:
1574 case R_390_PC16DBL:
1575 case R_390_PC24DBL:
1576 case R_390_PC32DBL:
1577 case R_390_PC32:
1578 if (bfd_link_pic (info))
1579 break;
1580 /* Fall through. */
1581
1582 case R_390_PLT12DBL:
1583 case R_390_PLT16DBL:
1584 case R_390_PLT24DBL:
1585 case R_390_PLT32DBL:
1586 case R_390_PLT32:
1587 case R_390_PLTOFF16:
1588 case R_390_PLTOFF32:
1589 if (h != NULL)
1590 {
1591 if (h->plt.refcount > 0)
1592 h->plt.refcount -= 1;
1593 }
1594 break;
1595
1596 case R_390_GOTPLT12:
1597 case R_390_GOTPLT16:
1598 case R_390_GOTPLT20:
1599 case R_390_GOTPLT32:
1600 case R_390_GOTPLTENT:
1601 if (h != NULL)
1602 {
1603 if (h->plt.refcount > 0)
1604 {
1605 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1606 h->plt.refcount -= 1;
1607 }
1608 }
1609 else if (local_got_refcounts != NULL)
1610 {
1611 if (local_got_refcounts[r_symndx] > 0)
1612 local_got_refcounts[r_symndx] -= 1;
1613 }
1614 break;
1615
1616 default:
1617 break;
1618 }
1619 }
1620
1621 return TRUE;
1622 }
1623
1624 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1625 entry but we found we will not create any. Called when we find we will
1626 not have any PLT for this symbol, by for example
1627 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1628 or elf_s390_size_dynamic_sections if no dynamic sections will be
1629 created (we're only linking static objects). */
1630
1631 static void
1632 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1633 {
1634 if (h->elf.root.type == bfd_link_hash_warning)
1635 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1636
1637 if (h->gotplt_refcount <= 0)
1638 return;
1639
1640 /* We simply add the number of gotplt references to the number
1641 * of got references for this symbol. */
1642 h->elf.got.refcount += h->gotplt_refcount;
1643 h->gotplt_refcount = -1;
1644 }
1645
1646 /* Adjust a symbol defined by a dynamic object and referenced by a
1647 regular object. The current definition is in some section of the
1648 dynamic object, but we're not including those sections. We have to
1649 change the definition to something the rest of the link can
1650 understand. */
1651
1652 static bfd_boolean
1653 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1654 struct elf_link_hash_entry *h)
1655 {
1656 struct elf_s390_link_hash_table *htab;
1657 asection *s;
1658
1659 /* STT_GNU_IFUNC symbol must go through PLT. */
1660 if (s390_is_ifunc_symbol_p (h))
1661 {
1662 /* All local STT_GNU_IFUNC references must be treated as local
1663 calls via local PLT. */
1664 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1665 {
1666 bfd_size_type pc_count = 0, count = 0;
1667 struct elf_dyn_relocs **pp;
1668 struct elf_s390_link_hash_entry *eh;
1669 struct elf_dyn_relocs *p;
1670
1671 eh = (struct elf_s390_link_hash_entry *) h;
1672 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1673 {
1674 pc_count += p->pc_count;
1675 p->count -= p->pc_count;
1676 p->pc_count = 0;
1677 count += p->count;
1678 if (p->count == 0)
1679 *pp = p->next;
1680 else
1681 pp = &p->next;
1682 }
1683
1684 if (pc_count || count)
1685 {
1686 h->needs_plt = 1;
1687 h->non_got_ref = 1;
1688 if (h->plt.refcount <= 0)
1689 h->plt.refcount = 1;
1690 else
1691 h->plt.refcount += 1;
1692 }
1693 }
1694
1695 if (h->plt.refcount <= 0)
1696 {
1697 h->plt.offset = (bfd_vma) -1;
1698 h->needs_plt = 0;
1699 }
1700 return TRUE;
1701 }
1702
1703 /* If this is a function, put it in the procedure linkage table. We
1704 will fill in the contents of the procedure linkage table later
1705 (although we could actually do it here). */
1706 if (h->type == STT_FUNC
1707 || h->needs_plt)
1708 {
1709 if (h->plt.refcount <= 0
1710 || SYMBOL_CALLS_LOCAL (info, h)
1711 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1712 && h->root.type != bfd_link_hash_undefweak))
1713 {
1714 /* This case can occur if we saw a PLT32 reloc in an input
1715 file, but the symbol was never referred to by a dynamic
1716 object, or if all references were garbage collected. In
1717 such a case, we don't actually need to build a procedure
1718 linkage table, and we can just do a PC32 reloc instead. */
1719 h->plt.offset = (bfd_vma) -1;
1720 h->needs_plt = 0;
1721 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1722 }
1723
1724 return TRUE;
1725 }
1726 else
1727 /* It's possible that we incorrectly decided a .plt reloc was
1728 needed for an R_390_PC32 reloc to a non-function sym in
1729 check_relocs. We can't decide accurately between function and
1730 non-function syms in check-relocs; Objects loaded later in
1731 the link may change h->type. So fix it now. */
1732 h->plt.offset = (bfd_vma) -1;
1733
1734 /* If this is a weak symbol, and there is a real definition, the
1735 processor independent code will have arranged for us to see the
1736 real definition first, and we can just use the same value. */
1737 if (h->u.weakdef != NULL)
1738 {
1739 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1740 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1741 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1742 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1743 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1744 h->non_got_ref = h->u.weakdef->non_got_ref;
1745 return TRUE;
1746 }
1747
1748 /* This is a reference to a symbol defined by a dynamic object which
1749 is not a function. */
1750
1751 /* If we are creating a shared library, we must presume that the
1752 only references to the symbol are via the global offset table.
1753 For such cases we need not do anything here; the relocations will
1754 be handled correctly by relocate_section. */
1755 if (bfd_link_pic (info))
1756 return TRUE;
1757
1758 /* If there are no references to this symbol that do not use the
1759 GOT, we don't need to generate a copy reloc. */
1760 if (!h->non_got_ref)
1761 return TRUE;
1762
1763 /* If -z nocopyreloc was given, we won't generate them either. */
1764 if (info->nocopyreloc)
1765 {
1766 h->non_got_ref = 0;
1767 return TRUE;
1768 }
1769
1770 if (ELIMINATE_COPY_RELOCS)
1771 {
1772 struct elf_s390_link_hash_entry * eh;
1773 struct elf_dyn_relocs *p;
1774
1775 eh = (struct elf_s390_link_hash_entry *) h;
1776 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1777 {
1778 s = p->sec->output_section;
1779 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1780 break;
1781 }
1782
1783 /* If we didn't find any dynamic relocs in read-only sections, then
1784 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1785 if (p == NULL)
1786 {
1787 h->non_got_ref = 0;
1788 return TRUE;
1789 }
1790 }
1791
1792 /* We must allocate the symbol in our .dynbss section, which will
1793 become part of the .bss section of the executable. There will be
1794 an entry for this symbol in the .dynsym section. The dynamic
1795 object will contain position independent code, so all references
1796 from the dynamic object to this symbol will go through the global
1797 offset table. The dynamic linker will use the .dynsym entry to
1798 determine the address it must put in the global offset table, so
1799 both the dynamic object and the regular object will refer to the
1800 same memory location for the variable. */
1801
1802 htab = elf_s390_hash_table (info);
1803
1804 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1805 copy the initial value out of the dynamic object and into the
1806 runtime process image. */
1807 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1808 {
1809 htab->srelbss->size += sizeof (Elf32_External_Rela);
1810 h->needs_copy = 1;
1811 }
1812
1813 s = htab->sdynbss;
1814
1815 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1816 }
1817
1818 /* Allocate space in .plt, .got and associated reloc sections for
1819 dynamic relocs. */
1820
1821 static bfd_boolean
1822 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1823 {
1824 struct bfd_link_info *info;
1825 struct elf_s390_link_hash_table *htab;
1826 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1827 struct elf_dyn_relocs *p;
1828
1829 if (h->root.type == bfd_link_hash_indirect)
1830 return TRUE;
1831
1832 info = (struct bfd_link_info *) inf;
1833 htab = elf_s390_hash_table (info);
1834
1835 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1836 here if it is defined and referenced in a non-shared object. */
1837 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1838 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1839 else if (htab->elf.dynamic_sections_created
1840 && h->plt.refcount > 0)
1841 {
1842 /* Make sure this symbol is output as a dynamic symbol.
1843 Undefined weak syms won't yet be marked as dynamic. */
1844 if (h->dynindx == -1
1845 && !h->forced_local)
1846 {
1847 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1848 return FALSE;
1849 }
1850
1851 if (bfd_link_pic (info)
1852 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1853 {
1854 asection *s = htab->elf.splt;
1855
1856 /* If this is the first .plt entry, make room for the special
1857 first entry. */
1858 if (s->size == 0)
1859 s->size += PLT_FIRST_ENTRY_SIZE;
1860
1861 h->plt.offset = s->size;
1862
1863 /* If this symbol is not defined in a regular file, and we are
1864 not generating a shared library, then set the symbol to this
1865 location in the .plt. This is required to make function
1866 pointers compare as equal between the normal executable and
1867 the shared library. */
1868 if (! bfd_link_pic (info)
1869 && !h->def_regular)
1870 {
1871 h->root.u.def.section = s;
1872 h->root.u.def.value = h->plt.offset;
1873 }
1874
1875 /* Make room for this entry. */
1876 s->size += PLT_ENTRY_SIZE;
1877
1878 /* We also need to make an entry in the .got.plt section, which
1879 will be placed in the .got section by the linker script. */
1880 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1881
1882 /* We also need to make an entry in the .rela.plt section. */
1883 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1884 }
1885 else
1886 {
1887 h->plt.offset = (bfd_vma) -1;
1888 h->needs_plt = 0;
1889 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1890 }
1891 }
1892 else
1893 {
1894 h->plt.offset = (bfd_vma) -1;
1895 h->needs_plt = 0;
1896 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1897 }
1898
1899 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1900 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1901 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1902 we can save the dynamic TLS relocation. */
1903 if (h->got.refcount > 0
1904 && !bfd_link_pic (info)
1905 && h->dynindx == -1
1906 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1907 {
1908 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1909 /* For the GOTIE access without a literal pool entry the offset has
1910 to be stored somewhere. The immediate value in the instruction
1911 is not bit enough so the value is stored in the got. */
1912 {
1913 h->got.offset = htab->elf.sgot->size;
1914 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1915 }
1916 else
1917 h->got.offset = (bfd_vma) -1;
1918 }
1919 else if (h->got.refcount > 0)
1920 {
1921 asection *s;
1922 bfd_boolean dyn;
1923 int tls_type = elf_s390_hash_entry(h)->tls_type;
1924
1925 /* Make sure this symbol is output as a dynamic symbol.
1926 Undefined weak syms won't yet be marked as dynamic. */
1927 if (h->dynindx == -1
1928 && !h->forced_local)
1929 {
1930 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1931 return FALSE;
1932 }
1933
1934 s = htab->elf.sgot;
1935 h->got.offset = s->size;
1936 s->size += GOT_ENTRY_SIZE;
1937 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1938 if (tls_type == GOT_TLS_GD)
1939 s->size += GOT_ENTRY_SIZE;
1940 dyn = htab->elf.dynamic_sections_created;
1941 /* R_390_TLS_IE32 needs one dynamic relocation,
1942 R_390_TLS_GD32 needs one if local symbol and two if global. */
1943 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1944 || tls_type >= GOT_TLS_IE)
1945 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1946 else if (tls_type == GOT_TLS_GD)
1947 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1948 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1949 || h->root.type != bfd_link_hash_undefweak)
1950 && (bfd_link_pic (info)
1951 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1952 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1953 }
1954 else
1955 h->got.offset = (bfd_vma) -1;
1956
1957 if (eh->dyn_relocs == NULL)
1958 return TRUE;
1959
1960 /* In the shared -Bsymbolic case, discard space allocated for
1961 dynamic pc-relative relocs against symbols which turn out to be
1962 defined in regular objects. For the normal shared case, discard
1963 space for pc-relative relocs that have become local due to symbol
1964 visibility changes. */
1965
1966 if (bfd_link_pic (info))
1967 {
1968 if (SYMBOL_CALLS_LOCAL (info, h))
1969 {
1970 struct elf_dyn_relocs **pp;
1971
1972 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1973 {
1974 p->count -= p->pc_count;
1975 p->pc_count = 0;
1976 if (p->count == 0)
1977 *pp = p->next;
1978 else
1979 pp = &p->next;
1980 }
1981 }
1982
1983 /* Also discard relocs on undefined weak syms with non-default
1984 visibility. */
1985 if (eh->dyn_relocs != NULL
1986 && h->root.type == bfd_link_hash_undefweak)
1987 {
1988 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1989 eh->dyn_relocs = NULL;
1990
1991 /* Make sure undefined weak symbols are output as a dynamic
1992 symbol in PIEs. */
1993 else if (h->dynindx == -1
1994 && !h->forced_local)
1995 {
1996 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1997 return FALSE;
1998 }
1999 }
2000 }
2001 else if (ELIMINATE_COPY_RELOCS)
2002 {
2003 /* For the non-shared case, discard space for relocs against
2004 symbols which turn out to need copy relocs or are not
2005 dynamic. */
2006
2007 if (!h->non_got_ref
2008 && ((h->def_dynamic
2009 && !h->def_regular)
2010 || (htab->elf.dynamic_sections_created
2011 && (h->root.type == bfd_link_hash_undefweak
2012 || h->root.type == bfd_link_hash_undefined))))
2013 {
2014 /* Make sure this symbol is output as a dynamic symbol.
2015 Undefined weak syms won't yet be marked as dynamic. */
2016 if (h->dynindx == -1
2017 && !h->forced_local)
2018 {
2019 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2020 return FALSE;
2021 }
2022
2023 /* If that succeeded, we know we'll be keeping all the
2024 relocs. */
2025 if (h->dynindx != -1)
2026 goto keep;
2027 }
2028
2029 eh->dyn_relocs = NULL;
2030
2031 keep: ;
2032 }
2033
2034 /* Finally, allocate space. */
2035 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2036 {
2037 asection *sreloc = elf_section_data (p->sec)->sreloc;
2038
2039 sreloc->size += p->count * sizeof (Elf32_External_Rela);
2040 }
2041
2042 return TRUE;
2043 }
2044
2045 /* Find any dynamic relocs that apply to read-only sections. */
2046
2047 static bfd_boolean
2048 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2049 {
2050 struct elf_s390_link_hash_entry *eh;
2051 struct elf_dyn_relocs *p;
2052
2053 eh = (struct elf_s390_link_hash_entry *) h;
2054 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2055 {
2056 asection *s = p->sec->output_section;
2057
2058 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2059 {
2060 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2061
2062 info->flags |= DF_TEXTREL;
2063
2064 /* Not an error, just cut short the traversal. */
2065 return FALSE;
2066 }
2067 }
2068 return TRUE;
2069 }
2070
2071 /* Set the sizes of the dynamic sections. */
2072
2073 static bfd_boolean
2074 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2075 struct bfd_link_info *info)
2076 {
2077 struct elf_s390_link_hash_table *htab;
2078 bfd *dynobj;
2079 asection *s;
2080 bfd_boolean relocs;
2081 bfd *ibfd;
2082
2083 htab = elf_s390_hash_table (info);
2084 dynobj = htab->elf.dynobj;
2085 if (dynobj == NULL)
2086 abort ();
2087
2088 if (htab->elf.dynamic_sections_created)
2089 {
2090 /* Set the contents of the .interp section to the interpreter. */
2091 if (bfd_link_executable (info) && !info->nointerp)
2092 {
2093 s = bfd_get_linker_section (dynobj, ".interp");
2094 if (s == NULL)
2095 abort ();
2096 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2097 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2098 }
2099 }
2100
2101 /* Set up .got offsets for local syms, and space for local dynamic
2102 relocs. */
2103 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2104 {
2105 bfd_signed_vma *local_got;
2106 bfd_signed_vma *end_local_got;
2107 char *local_tls_type;
2108 bfd_size_type locsymcount;
2109 Elf_Internal_Shdr *symtab_hdr;
2110 asection *srela;
2111 struct plt_entry *local_plt;
2112 unsigned int i;
2113
2114 if (! is_s390_elf (ibfd))
2115 continue;
2116
2117 for (s = ibfd->sections; s != NULL; s = s->next)
2118 {
2119 struct elf_dyn_relocs *p;
2120
2121 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2122 {
2123 if (!bfd_is_abs_section (p->sec)
2124 && bfd_is_abs_section (p->sec->output_section))
2125 {
2126 /* Input section has been discarded, either because
2127 it is a copy of a linkonce section or due to
2128 linker script /DISCARD/, so we'll be discarding
2129 the relocs too. */
2130 }
2131 else if (p->count != 0)
2132 {
2133 srela = elf_section_data (p->sec)->sreloc;
2134 srela->size += p->count * sizeof (Elf32_External_Rela);
2135 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2136 info->flags |= DF_TEXTREL;
2137 }
2138 }
2139 }
2140
2141 local_got = elf_local_got_refcounts (ibfd);
2142 if (!local_got)
2143 continue;
2144
2145 symtab_hdr = &elf_symtab_hdr (ibfd);
2146 locsymcount = symtab_hdr->sh_info;
2147 end_local_got = local_got + locsymcount;
2148 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2149 s = htab->elf.sgot;
2150 srela = htab->elf.srelgot;
2151 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2152 {
2153 if (*local_got > 0)
2154 {
2155 *local_got = s->size;
2156 s->size += GOT_ENTRY_SIZE;
2157 if (*local_tls_type == GOT_TLS_GD)
2158 s->size += GOT_ENTRY_SIZE;
2159 if (bfd_link_pic (info))
2160 srela->size += sizeof (Elf32_External_Rela);
2161 }
2162 else
2163 *local_got = (bfd_vma) -1;
2164 }
2165 local_plt = elf_s390_local_plt (ibfd);
2166 for (i = 0; i < symtab_hdr->sh_info; i++)
2167 {
2168 if (local_plt[i].plt.refcount > 0)
2169 {
2170 local_plt[i].plt.offset = htab->elf.iplt->size;
2171 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2172 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2173 htab->elf.irelplt->size += RELA_ENTRY_SIZE;
2174 }
2175 else
2176 local_plt[i].plt.offset = (bfd_vma) -1;
2177 }
2178 }
2179
2180 if (htab->tls_ldm_got.refcount > 0)
2181 {
2182 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2183 relocs. */
2184 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2185 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2186 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
2187 }
2188 else
2189 htab->tls_ldm_got.offset = -1;
2190
2191 /* Allocate global sym .plt and .got entries, and space for global
2192 sym dynamic relocs. */
2193 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2194
2195 /* We now have determined the sizes of the various dynamic sections.
2196 Allocate memory for them. */
2197 relocs = FALSE;
2198 for (s = dynobj->sections; s != NULL; s = s->next)
2199 {
2200 if ((s->flags & SEC_LINKER_CREATED) == 0)
2201 continue;
2202
2203 if (s == htab->elf.splt
2204 || s == htab->elf.sgot
2205 || s == htab->elf.sgotplt
2206 || s == htab->sdynbss
2207 || s == htab->elf.iplt
2208 || s == htab->elf.igotplt
2209 || s == htab->irelifunc)
2210 {
2211 /* Strip this section if we don't need it; see the
2212 comment below. */
2213 }
2214 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2215 {
2216 if (s->size != 0)
2217 relocs = TRUE;
2218
2219 /* We use the reloc_count field as a counter if we need
2220 to copy relocs into the output file. */
2221 s->reloc_count = 0;
2222 }
2223 else
2224 {
2225 /* It's not one of our sections, so don't allocate space. */
2226 continue;
2227 }
2228
2229 if (s->size == 0)
2230 {
2231 /* If we don't need this section, strip it from the
2232 output file. This is to handle .rela.bss and
2233 .rela.plt. We must create it in
2234 create_dynamic_sections, because it must be created
2235 before the linker maps input sections to output
2236 sections. The linker does that before
2237 adjust_dynamic_symbol is called, and it is that
2238 function which decides whether anything needs to go
2239 into these sections. */
2240
2241 s->flags |= SEC_EXCLUDE;
2242 continue;
2243 }
2244
2245 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2246 continue;
2247
2248 /* Allocate memory for the section contents. We use bfd_zalloc
2249 here in case unused entries are not reclaimed before the
2250 section's contents are written out. This should not happen,
2251 but this way if it does, we get a R_390_NONE reloc instead
2252 of garbage. */
2253 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2254 if (s->contents == NULL)
2255 return FALSE;
2256 }
2257
2258 if (htab->elf.dynamic_sections_created)
2259 {
2260 /* Add some entries to the .dynamic section. We fill in the
2261 values later, in elf_s390_finish_dynamic_sections, but we
2262 must add the entries now so that we get the correct size for
2263 the .dynamic section. The DT_DEBUG entry is filled in by the
2264 dynamic linker and used by the debugger. */
2265 #define add_dynamic_entry(TAG, VAL) \
2266 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2267
2268 if (bfd_link_executable (info))
2269 {
2270 if (!add_dynamic_entry (DT_DEBUG, 0))
2271 return FALSE;
2272 }
2273
2274 if (htab->elf.splt->size != 0)
2275 {
2276 if (!add_dynamic_entry (DT_PLTGOT, 0)
2277 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2278 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2279 || !add_dynamic_entry (DT_JMPREL, 0))
2280 return FALSE;
2281 }
2282
2283 if (relocs)
2284 {
2285 if (!add_dynamic_entry (DT_RELA, 0)
2286 || !add_dynamic_entry (DT_RELASZ, 0)
2287 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2288 return FALSE;
2289
2290 /* If any dynamic relocs apply to a read-only section,
2291 then we need a DT_TEXTREL entry. */
2292 if ((info->flags & DF_TEXTREL) == 0)
2293 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
2294
2295 if ((info->flags & DF_TEXTREL) != 0)
2296 {
2297 if (!add_dynamic_entry (DT_TEXTREL, 0))
2298 return FALSE;
2299 }
2300 }
2301 }
2302 #undef add_dynamic_entry
2303
2304 return TRUE;
2305 }
2306
2307 /* Return the base VMA address which should be subtracted from real addresses
2308 when resolving @dtpoff relocation.
2309 This is PT_TLS segment p_vaddr. */
2310
2311 static bfd_vma
2312 dtpoff_base (struct bfd_link_info *info)
2313 {
2314 /* If tls_sec is NULL, we should have signalled an error already. */
2315 if (elf_hash_table (info)->tls_sec == NULL)
2316 return 0;
2317 return elf_hash_table (info)->tls_sec->vma;
2318 }
2319
2320 /* Return the relocation value for @tpoff relocation
2321 if STT_TLS virtual address is ADDRESS. */
2322
2323 static bfd_vma
2324 tpoff (struct bfd_link_info *info, bfd_vma address)
2325 {
2326 struct elf_link_hash_table *htab = elf_hash_table (info);
2327
2328 /* If tls_sec is NULL, we should have signalled an error already. */
2329 if (htab->tls_sec == NULL)
2330 return 0;
2331 return htab->tls_size + htab->tls_sec->vma - address;
2332 }
2333
2334 /* Complain if TLS instruction relocation is against an invalid
2335 instruction. */
2336
2337 static void
2338 invalid_tls_insn (bfd *input_bfd,
2339 asection *input_section,
2340 Elf_Internal_Rela *rel)
2341 {
2342 reloc_howto_type *howto;
2343
2344 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2345 (*_bfd_error_handler)
2346 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2347 input_bfd,
2348 input_section,
2349 (long) rel->r_offset,
2350 howto->name);
2351 bfd_set_error (bfd_error_bad_value);
2352 }
2353
2354 /* Relocate a 390 ELF section. */
2355
2356 static bfd_boolean
2357 elf_s390_relocate_section (bfd *output_bfd,
2358 struct bfd_link_info *info,
2359 bfd *input_bfd,
2360 asection *input_section,
2361 bfd_byte *contents,
2362 Elf_Internal_Rela *relocs,
2363 Elf_Internal_Sym *local_syms,
2364 asection **local_sections)
2365 {
2366 struct elf_s390_link_hash_table *htab;
2367 Elf_Internal_Shdr *symtab_hdr;
2368 struct elf_link_hash_entry **sym_hashes;
2369 bfd_vma *local_got_offsets;
2370 Elf_Internal_Rela *rel;
2371 Elf_Internal_Rela *relend;
2372
2373 BFD_ASSERT (is_s390_elf (input_bfd));
2374
2375 htab = elf_s390_hash_table (info);
2376 symtab_hdr = &elf_symtab_hdr (input_bfd);
2377 sym_hashes = elf_sym_hashes (input_bfd);
2378 local_got_offsets = elf_local_got_offsets (input_bfd);
2379
2380 rel = relocs;
2381 relend = relocs + input_section->reloc_count;
2382 for (; rel < relend; rel++)
2383 {
2384 unsigned int r_type;
2385 reloc_howto_type *howto;
2386 unsigned long r_symndx;
2387 struct elf_link_hash_entry *h;
2388 Elf_Internal_Sym *sym;
2389 asection *sec;
2390 bfd_vma off;
2391 bfd_vma relocation;
2392 bfd_boolean unresolved_reloc;
2393 bfd_reloc_status_type r;
2394 int tls_type;
2395 asection *base_got = htab->elf.sgot;
2396
2397 r_type = ELF32_R_TYPE (rel->r_info);
2398 if (r_type == (int) R_390_GNU_VTINHERIT
2399 || r_type == (int) R_390_GNU_VTENTRY)
2400 continue;
2401 if (r_type >= (int) R_390_max)
2402 {
2403 bfd_set_error (bfd_error_bad_value);
2404 return FALSE;
2405 }
2406
2407 howto = elf_howto_table + r_type;
2408 r_symndx = ELF32_R_SYM (rel->r_info);
2409
2410 h = NULL;
2411 sym = NULL;
2412 sec = NULL;
2413 unresolved_reloc = FALSE;
2414 if (r_symndx < symtab_hdr->sh_info)
2415 {
2416 sym = local_syms + r_symndx;
2417 sec = local_sections[r_symndx];
2418 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2419 {
2420 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2421 if (local_plt == NULL)
2422 return FALSE;
2423
2424 /* Address of the PLT slot. */
2425 relocation = (htab->elf.iplt->output_section->vma
2426 + htab->elf.iplt->output_offset
2427 + local_plt[r_symndx].plt.offset);
2428
2429 switch (r_type)
2430 {
2431 case R_390_PLTOFF16:
2432 case R_390_PLTOFF32:
2433 relocation -= htab->elf.sgot->output_section->vma;
2434 break;
2435 case R_390_GOTPLT12:
2436 case R_390_GOTPLT16:
2437 case R_390_GOTPLT20:
2438 case R_390_GOTPLT32:
2439 case R_390_GOTPLTENT:
2440 case R_390_GOT12:
2441 case R_390_GOT16:
2442 case R_390_GOT20:
2443 case R_390_GOT32:
2444 case R_390_GOTENT:
2445 {
2446 /* Write the PLT slot address into the GOT slot. */
2447 bfd_put_32 (output_bfd, relocation,
2448 htab->elf.sgot->contents +
2449 local_got_offsets[r_symndx]);
2450 relocation = (local_got_offsets[r_symndx] +
2451 htab->elf.sgot->output_offset);
2452
2453 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2454 relocation += htab->elf.sgot->output_section->vma;
2455 break;
2456 }
2457 default:
2458 break;
2459 }
2460 /* The output section is needed later in
2461 finish_dynamic_section when creating the dynamic
2462 relocation. */
2463 local_plt[r_symndx].sec = sec;
2464 goto do_relocation;
2465 }
2466 else
2467 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2468 }
2469 else
2470 {
2471 bfd_boolean warned ATTRIBUTE_UNUSED;
2472 bfd_boolean ignored ATTRIBUTE_UNUSED;
2473
2474 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2475 r_symndx, symtab_hdr, sym_hashes,
2476 h, sec, relocation,
2477 unresolved_reloc, warned, ignored);
2478 }
2479
2480 if (sec != NULL && discarded_section (sec))
2481 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2482 rel, 1, relend, howto, 0, contents);
2483
2484 if (bfd_link_relocatable (info))
2485 continue;
2486
2487 switch (r_type)
2488 {
2489 case R_390_GOTPLT12:
2490 case R_390_GOTPLT16:
2491 case R_390_GOTPLT20:
2492 case R_390_GOTPLT32:
2493 case R_390_GOTPLTENT:
2494 /* There are three cases for a GOTPLT relocation. 1) The
2495 relocation is against the jump slot entry of a plt that
2496 will get emitted to the output file. 2) The relocation
2497 is against the jump slot of a plt entry that has been
2498 removed. elf_s390_adjust_gotplt has created a GOT entry
2499 as replacement. 3) The relocation is against a local symbol.
2500 Cases 2) and 3) are the same as the GOT relocation code
2501 so we just have to test for case 1 and fall through for
2502 the other two. */
2503 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2504 {
2505 bfd_vma plt_index;
2506
2507 if (s390_is_ifunc_symbol_p (h))
2508 {
2509 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2510 relocation = (plt_index * GOT_ENTRY_SIZE +
2511 htab->elf.igotplt->output_offset);
2512 if (r_type == R_390_GOTPLTENT)
2513 relocation += htab->elf.igotplt->output_section->vma;
2514 }
2515 else
2516 {
2517 /* Calc. index no.
2518 Current offset - size first entry / entry size. */
2519 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2520 PLT_ENTRY_SIZE;
2521
2522 /* Offset in GOT is PLT index plus GOT headers(3)
2523 times 4, addr & GOT addr. */
2524 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2525 if (r_type == R_390_GOTPLTENT)
2526 relocation += htab->elf.sgot->output_section->vma;
2527 }
2528 unresolved_reloc = FALSE;
2529
2530 }
2531 /* Fall through. */
2532
2533 case R_390_GOT12:
2534 case R_390_GOT16:
2535 case R_390_GOT20:
2536 case R_390_GOT32:
2537 case R_390_GOTENT:
2538 /* Relocation is to the entry for this symbol in the global
2539 offset table. */
2540 if (base_got == NULL)
2541 abort ();
2542
2543 if (h != NULL)
2544 {
2545 bfd_boolean dyn;
2546
2547 off = h->got.offset;
2548 dyn = htab->elf.dynamic_sections_created;
2549
2550 if (s390_is_ifunc_symbol_p (h))
2551 {
2552 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2553 if (off == (bfd_vma)-1)
2554 {
2555 /* No explicit GOT usage so redirect to the
2556 got.iplt slot. */
2557 base_got = htab->elf.igotplt;
2558 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2559 }
2560 else
2561 {
2562 /* Explicit GOT slots must contain the address
2563 of the PLT slot. This will be handled in
2564 finish_dynamic_symbol. */
2565 }
2566 }
2567 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2568 bfd_link_pic (info),
2569 h)
2570 || (bfd_link_pic (info)
2571 && SYMBOL_REFERENCES_LOCAL (info, h))
2572 || (ELF_ST_VISIBILITY (h->other)
2573 && h->root.type == bfd_link_hash_undefweak))
2574
2575 {
2576 /* This is actually a static link, or it is a
2577 -Bsymbolic link and the symbol is defined
2578 locally, or the symbol was forced to be local
2579 because of a version file. We must initialize
2580 this entry in the global offset table. Since the
2581 offset must always be a multiple of 2, we use the
2582 least significant bit to record whether we have
2583 initialized it already.
2584
2585 When doing a dynamic link, we create a .rel.got
2586 relocation entry to initialize the value. This
2587 is done in the finish_dynamic_symbol routine. */
2588 if ((off & 1) != 0)
2589 off &= ~1;
2590 else
2591 {
2592 bfd_put_32 (output_bfd, relocation,
2593 base_got->contents + off);
2594 h->got.offset |= 1;
2595 }
2596
2597 if ((h->def_regular
2598 && bfd_link_pic (info)
2599 && SYMBOL_REFERENCES_LOCAL (info, h))
2600 /* lrl rx,sym@GOTENT -> larl rx, sym */
2601 && ((r_type == R_390_GOTENT
2602 && (bfd_get_16 (input_bfd,
2603 contents + rel->r_offset - 2)
2604 & 0xff0f) == 0xc40d)
2605 /* ly rx, sym@GOT(r12) -> larl rx, sym */
2606 || (r_type == R_390_GOT20
2607 && (bfd_get_32 (input_bfd,
2608 contents + rel->r_offset - 2)
2609 & 0xff00f000) == 0xe300c000
2610 && bfd_get_8 (input_bfd,
2611 contents + rel->r_offset + 3) == 0x58)))
2612 {
2613 unsigned short new_insn =
2614 (0xc000 | (bfd_get_8 (input_bfd,
2615 contents + rel->r_offset - 1) & 0xf0));
2616 bfd_put_16 (output_bfd, new_insn,
2617 contents + rel->r_offset - 2);
2618 r_type = R_390_PC32DBL;
2619 rel->r_addend = 2;
2620 howto = elf_howto_table + r_type;
2621 relocation = h->root.u.def.value
2622 + h->root.u.def.section->output_section->vma
2623 + h->root.u.def.section->output_offset;
2624 goto do_relocation;
2625 }
2626 }
2627 else
2628 unresolved_reloc = FALSE;
2629 }
2630 else
2631 {
2632 if (local_got_offsets == NULL)
2633 abort ();
2634
2635 off = local_got_offsets[r_symndx];
2636
2637 /* The offset must always be a multiple of 4. We use
2638 the least significant bit to record whether we have
2639 already generated the necessary reloc. */
2640 if ((off & 1) != 0)
2641 off &= ~1;
2642 else
2643 {
2644 bfd_put_32 (output_bfd, relocation,
2645 htab->elf.sgot->contents + off);
2646
2647 if (bfd_link_pic (info))
2648 {
2649 asection *srelgot;
2650 Elf_Internal_Rela outrel;
2651 bfd_byte *loc;
2652
2653 srelgot = htab->elf.srelgot;
2654 if (srelgot == NULL)
2655 abort ();
2656
2657 outrel.r_offset = (htab->elf.sgot->output_section->vma
2658 + htab->elf.sgot->output_offset
2659 + off);
2660 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2661 outrel.r_addend = relocation;
2662 loc = srelgot->contents;
2663 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2664 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2665 }
2666
2667 local_got_offsets[r_symndx] |= 1;
2668 }
2669 }
2670
2671 if (off >= (bfd_vma) -2)
2672 abort ();
2673
2674 relocation = base_got->output_offset + off;
2675
2676 /* For @GOTENT the relocation is against the offset between
2677 the instruction and the symbols entry in the GOT and not
2678 between the start of the GOT and the symbols entry. We
2679 add the vma of the GOT to get the correct value. */
2680 if ( r_type == R_390_GOTENT
2681 || r_type == R_390_GOTPLTENT)
2682 relocation += base_got->output_section->vma;
2683
2684 break;
2685
2686 case R_390_GOTOFF16:
2687 case R_390_GOTOFF32:
2688 /* Relocation is relative to the start of the global offset
2689 table. */
2690
2691 if (h != NULL
2692 && s390_is_ifunc_symbol_p (h)
2693 && h->def_regular
2694 && !bfd_link_executable (info))
2695 {
2696 relocation = (htab->elf.iplt->output_section->vma
2697 + htab->elf.iplt->output_offset
2698 + h->plt.offset
2699 - htab->elf.sgot->output_section->vma);
2700 goto do_relocation;
2701 }
2702
2703 /* Note that sgot->output_offset is not involved in this
2704 calculation. We always want the start of .got. If we
2705 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2706 permitted by the ABI, we might have to change this
2707 calculation. */
2708 relocation -= htab->elf.sgot->output_section->vma;
2709 break;
2710
2711 case R_390_GOTPC:
2712 case R_390_GOTPCDBL:
2713 /* Use global offset table as symbol value. */
2714 relocation = htab->elf.sgot->output_section->vma;
2715 unresolved_reloc = FALSE;
2716 break;
2717
2718 case R_390_PLT12DBL:
2719 case R_390_PLT16DBL:
2720 case R_390_PLT24DBL:
2721 case R_390_PLT32DBL:
2722 case R_390_PLT32:
2723 /* Relocation is to the entry for this symbol in the
2724 procedure linkage table. */
2725
2726 /* Resolve a PLT32 reloc against a local symbol directly,
2727 without using the procedure linkage table. */
2728 if (h == NULL)
2729 break;
2730
2731 if (h->plt.offset == (bfd_vma) -1
2732 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2733 {
2734 /* We didn't make a PLT entry for this symbol. This
2735 happens when statically linking PIC code, or when
2736 using -Bsymbolic. */
2737 break;
2738 }
2739
2740 if (s390_is_ifunc_symbol_p (h))
2741 relocation = (htab->elf.iplt->output_section->vma
2742 + htab->elf.iplt->output_offset
2743 + h->plt.offset);
2744 else
2745 relocation = (htab->elf.splt->output_section->vma
2746 + htab->elf.splt->output_offset
2747 + h->plt.offset);
2748 unresolved_reloc = FALSE;
2749 break;
2750
2751 case R_390_PLTOFF16:
2752 case R_390_PLTOFF32:
2753 /* Relocation is to the entry for this symbol in the
2754 procedure linkage table relative to the start of the GOT. */
2755
2756 /* For local symbols or if we didn't make a PLT entry for
2757 this symbol resolve the symbol directly. */
2758 if (h == NULL
2759 || h->plt.offset == (bfd_vma) -1
2760 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2761 {
2762 relocation -= htab->elf.sgot->output_section->vma;
2763 break;
2764 }
2765
2766 if (s390_is_ifunc_symbol_p (h))
2767 relocation = (htab->elf.iplt->output_section->vma
2768 + htab->elf.iplt->output_offset
2769 + h->plt.offset
2770 - htab->elf.sgot->output_section->vma);
2771 else
2772 relocation = (htab->elf.splt->output_section->vma
2773 + htab->elf.splt->output_offset
2774 + h->plt.offset
2775 - htab->elf.sgot->output_section->vma);
2776 unresolved_reloc = FALSE;
2777 break;
2778
2779 case R_390_PC16:
2780 case R_390_PC12DBL:
2781 case R_390_PC16DBL:
2782 case R_390_PC24DBL:
2783 case R_390_PC32DBL:
2784 case R_390_PC32:
2785 if (h != NULL
2786 && s390_is_ifunc_symbol_p (h)
2787 && h->def_regular
2788 && !bfd_link_executable (info))
2789 {
2790 /* This will not work our if the function does not
2791 happen to set up the GOT pointer for some other
2792 reason. 31 bit PLT entries require r12 to hold the
2793 GOT pointer.
2794 FIXME: Implement an errorcheck.
2795 NOTE: It will work when brasl is not available
2796 (e.g. with -m31 -march=g5) since a local function
2797 call then does use GOTOFF which implies r12 being set
2798 up. */
2799 relocation = (htab->elf.iplt->output_section->vma
2800 + htab->elf.iplt->output_offset
2801 + h ->plt.offset);
2802 goto do_relocation;
2803 }
2804
2805 case R_390_8:
2806 case R_390_16:
2807 case R_390_32:
2808 if (h != NULL
2809 && s390_is_ifunc_symbol_p (h)
2810 && h->def_regular)
2811 {
2812 if (!bfd_link_pic (info) || !h->non_got_ref)
2813 {
2814 /* For a non-shared object STT_GNU_IFUNC symbol must
2815 go through PLT. */
2816 relocation = (htab->elf.iplt->output_section->vma
2817 + htab->elf.iplt->output_offset
2818 + h ->plt.offset);
2819 goto do_relocation;
2820 }
2821 else
2822 {
2823 /* For shared objects a runtime relocation is needed. */
2824
2825 Elf_Internal_Rela outrel;
2826 asection *sreloc;
2827
2828 /* Need a dynamic relocation to get the real function
2829 address. */
2830 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2831 info,
2832 input_section,
2833 rel->r_offset);
2834 if (outrel.r_offset == (bfd_vma) -1
2835 || outrel.r_offset == (bfd_vma) -2)
2836 abort ();
2837
2838 outrel.r_offset += (input_section->output_section->vma
2839 + input_section->output_offset);
2840
2841 if (h->dynindx == -1
2842 || h->forced_local
2843 || bfd_link_executable (info))
2844 {
2845 /* This symbol is resolved locally. */
2846 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2847 outrel.r_addend = (h->root.u.def.value
2848 + h->root.u.def.section->output_section->vma
2849 + h->root.u.def.section->output_offset);
2850 }
2851 else
2852 {
2853 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2854 outrel.r_addend = 0;
2855 }
2856
2857 sreloc = htab->elf.irelifunc;
2858 elf_append_rela (output_bfd, sreloc, &outrel);
2859
2860 /* If this reloc is against an external symbol, we
2861 do not want to fiddle with the addend. Otherwise,
2862 we need to include the symbol value so that it
2863 becomes an addend for the dynamic reloc. For an
2864 internal symbol, we have updated addend. */
2865 continue;
2866 }
2867 }
2868
2869 if ((input_section->flags & SEC_ALLOC) == 0)
2870 break;
2871
2872 if ((bfd_link_pic (info)
2873 && (h == NULL
2874 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2875 || h->root.type != bfd_link_hash_undefweak)
2876 && ((r_type != R_390_PC16
2877 && r_type != R_390_PC12DBL
2878 && r_type != R_390_PC16DBL
2879 && r_type != R_390_PC24DBL
2880 && r_type != R_390_PC32DBL
2881 && r_type != R_390_PC32)
2882 || !SYMBOL_CALLS_LOCAL (info, h)))
2883 || (ELIMINATE_COPY_RELOCS
2884 && !bfd_link_pic (info)
2885 && h != NULL
2886 && h->dynindx != -1
2887 && !h->non_got_ref
2888 && ((h->def_dynamic
2889 && !h->def_regular)
2890 || h->root.type == bfd_link_hash_undefweak
2891 || h->root.type == bfd_link_hash_undefined)))
2892 {
2893 Elf_Internal_Rela outrel;
2894 bfd_boolean skip, relocate;
2895 asection *sreloc;
2896 bfd_byte *loc;
2897
2898 /* When generating a shared object, these relocations
2899 are copied into the output file to be resolved at run
2900 time. */
2901
2902 skip = FALSE;
2903 relocate = FALSE;
2904
2905 outrel.r_offset =
2906 _bfd_elf_section_offset (output_bfd, info, input_section,
2907 rel->r_offset);
2908 if (outrel.r_offset == (bfd_vma) -1)
2909 skip = TRUE;
2910 else if (outrel.r_offset == (bfd_vma) -2)
2911 skip = TRUE, relocate = TRUE;
2912 outrel.r_offset += (input_section->output_section->vma
2913 + input_section->output_offset);
2914
2915 if (skip)
2916 memset (&outrel, 0, sizeof outrel);
2917 else if (h != NULL
2918 && h->dynindx != -1
2919 && (r_type == R_390_PC16
2920 || r_type == R_390_PC12DBL
2921 || r_type == R_390_PC16DBL
2922 || r_type == R_390_PC24DBL
2923 || r_type == R_390_PC32DBL
2924 || r_type == R_390_PC32
2925 || !bfd_link_pic (info)
2926 || !SYMBOLIC_BIND (info, h)
2927 || !h->def_regular))
2928 {
2929 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2930 outrel.r_addend = rel->r_addend;
2931 }
2932 else
2933 {
2934 /* This symbol is local, or marked to become local. */
2935 outrel.r_addend = relocation + rel->r_addend;
2936 if (r_type == R_390_32)
2937 {
2938 relocate = TRUE;
2939 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2940 }
2941 else
2942 {
2943 long sindx;
2944
2945 if (bfd_is_abs_section (sec))
2946 sindx = 0;
2947 else if (sec == NULL || sec->owner == NULL)
2948 {
2949 bfd_set_error(bfd_error_bad_value);
2950 return FALSE;
2951 }
2952 else
2953 {
2954 asection *osec;
2955
2956 osec = sec->output_section;
2957 sindx = elf_section_data (osec)->dynindx;
2958 if (sindx == 0)
2959 {
2960 osec = htab->elf.text_index_section;
2961 sindx = elf_section_data (osec)->dynindx;
2962 }
2963 BFD_ASSERT (sindx != 0);
2964
2965 /* We are turning this relocation into one
2966 against a section symbol, so subtract out
2967 the output section's address but not the
2968 offset of the input section in the output
2969 section. */
2970 outrel.r_addend -= osec->vma;
2971 }
2972 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2973 }
2974 }
2975
2976 sreloc = elf_section_data (input_section)->sreloc;
2977 if (sreloc == NULL)
2978 abort ();
2979
2980 loc = sreloc->contents;
2981 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2982 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2983
2984 /* If this reloc is against an external symbol, we do
2985 not want to fiddle with the addend. Otherwise, we
2986 need to include the symbol value so that it becomes
2987 an addend for the dynamic reloc. */
2988 if (! relocate)
2989 continue;
2990 }
2991 break;
2992
2993 /* Relocations for tls literal pool entries. */
2994 case R_390_TLS_IE32:
2995 if (bfd_link_pic (info))
2996 {
2997 Elf_Internal_Rela outrel;
2998 asection *sreloc;
2999 bfd_byte *loc;
3000
3001 outrel.r_offset = rel->r_offset
3002 + input_section->output_section->vma
3003 + input_section->output_offset;
3004 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3005 sreloc = elf_section_data (input_section)->sreloc;
3006 if (sreloc == NULL)
3007 abort ();
3008 loc = sreloc->contents;
3009 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3010 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3011 }
3012 /* Fall through. */
3013
3014 case R_390_TLS_GD32:
3015 case R_390_TLS_GOTIE32:
3016 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
3017 tls_type = GOT_UNKNOWN;
3018 if (h == NULL && local_got_offsets)
3019 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3020 else if (h != NULL)
3021 {
3022 tls_type = elf_s390_hash_entry(h)->tls_type;
3023 if (!bfd_link_pic (info)
3024 && h->dynindx == -1
3025 && tls_type >= GOT_TLS_IE)
3026 r_type = R_390_TLS_LE32;
3027 }
3028 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
3029 r_type = R_390_TLS_IE32;
3030
3031 if (r_type == R_390_TLS_LE32)
3032 {
3033 /* This relocation gets optimized away by the local exec
3034 access optimization. */
3035 BFD_ASSERT (! unresolved_reloc);
3036 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3037 contents + rel->r_offset);
3038 continue;
3039 }
3040
3041 if (htab->elf.sgot == NULL)
3042 abort ();
3043
3044 if (h != NULL)
3045 off = h->got.offset;
3046 else
3047 {
3048 if (local_got_offsets == NULL)
3049 abort ();
3050
3051 off = local_got_offsets[r_symndx];
3052 }
3053
3054 emit_tls_relocs:
3055
3056 if ((off & 1) != 0)
3057 off &= ~1;
3058 else
3059 {
3060 Elf_Internal_Rela outrel;
3061 bfd_byte *loc;
3062 int dr_type, indx;
3063
3064 if (htab->elf.srelgot == NULL)
3065 abort ();
3066
3067 outrel.r_offset = (htab->elf.sgot->output_section->vma
3068 + htab->elf.sgot->output_offset + off);
3069
3070 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3071 if (r_type == R_390_TLS_GD32)
3072 dr_type = R_390_TLS_DTPMOD;
3073 else
3074 dr_type = R_390_TLS_TPOFF;
3075 if (dr_type == R_390_TLS_TPOFF && indx == 0)
3076 outrel.r_addend = relocation - dtpoff_base (info);
3077 else
3078 outrel.r_addend = 0;
3079 outrel.r_info = ELF32_R_INFO (indx, dr_type);
3080 loc = htab->elf.srelgot->contents;
3081 loc += htab->elf.srelgot->reloc_count++
3082 * sizeof (Elf32_External_Rela);
3083 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3084
3085 if (r_type == R_390_TLS_GD32)
3086 {
3087 if (indx == 0)
3088 {
3089 BFD_ASSERT (! unresolved_reloc);
3090 bfd_put_32 (output_bfd,
3091 relocation - dtpoff_base (info),
3092 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3093 }
3094 else
3095 {
3096 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
3097 outrel.r_offset += GOT_ENTRY_SIZE;
3098 outrel.r_addend = 0;
3099 htab->elf.srelgot->reloc_count++;
3100 loc += sizeof (Elf32_External_Rela);
3101 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3102 }
3103 }
3104
3105 if (h != NULL)
3106 h->got.offset |= 1;
3107 else
3108 local_got_offsets[r_symndx] |= 1;
3109 }
3110
3111 if (off >= (bfd_vma) -2)
3112 abort ();
3113 if (r_type == ELF32_R_TYPE (rel->r_info))
3114 {
3115 relocation = htab->elf.sgot->output_offset + off;
3116 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
3117 relocation += htab->elf.sgot->output_section->vma;
3118 unresolved_reloc = FALSE;
3119 }
3120 else
3121 {
3122 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
3123 contents + rel->r_offset);
3124 continue;
3125 }
3126 break;
3127
3128 case R_390_TLS_GOTIE12:
3129 case R_390_TLS_GOTIE20:
3130 case R_390_TLS_IEENT:
3131 if (h == NULL)
3132 {
3133 if (local_got_offsets == NULL)
3134 abort();
3135 off = local_got_offsets[r_symndx];
3136 if (bfd_link_pic (info))
3137 goto emit_tls_relocs;
3138 }
3139 else
3140 {
3141 off = h->got.offset;
3142 tls_type = elf_s390_hash_entry(h)->tls_type;
3143 if (bfd_link_pic (info)
3144 || h->dynindx != -1
3145 || tls_type < GOT_TLS_IE)
3146 goto emit_tls_relocs;
3147 }
3148
3149 if (htab->elf.sgot == NULL)
3150 abort ();
3151
3152 BFD_ASSERT (! unresolved_reloc);
3153 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3154 htab->elf.sgot->contents + off);
3155 relocation = htab->elf.sgot->output_offset + off;
3156 if (r_type == R_390_TLS_IEENT)
3157 relocation += htab->elf.sgot->output_section->vma;
3158 unresolved_reloc = FALSE;
3159 break;
3160
3161 case R_390_TLS_LDM32:
3162 if (! bfd_link_pic (info))
3163 /* The literal pool entry this relocation refers to gets ignored
3164 by the optimized code of the local exec model. Do nothing
3165 and the value will turn out zero. */
3166 continue;
3167
3168 if (htab->elf.sgot == NULL)
3169 abort ();
3170
3171 off = htab->tls_ldm_got.offset;
3172 if (off & 1)
3173 off &= ~1;
3174 else
3175 {
3176 Elf_Internal_Rela outrel;
3177 bfd_byte *loc;
3178
3179 if (htab->elf.srelgot == NULL)
3180 abort ();
3181
3182 outrel.r_offset = (htab->elf.sgot->output_section->vma
3183 + htab->elf.sgot->output_offset + off);
3184
3185 bfd_put_32 (output_bfd, 0,
3186 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3187 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
3188 outrel.r_addend = 0;
3189 loc = htab->elf.srelgot->contents;
3190 loc += htab->elf.srelgot->reloc_count++
3191 * sizeof (Elf32_External_Rela);
3192 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3193 htab->tls_ldm_got.offset |= 1;
3194 }
3195 relocation = htab->elf.sgot->output_offset + off;
3196 unresolved_reloc = FALSE;
3197 break;
3198
3199 case R_390_TLS_LE32:
3200 if (bfd_link_dll (info))
3201 {
3202 /* Linking a shared library with non-fpic code requires
3203 a R_390_TLS_TPOFF relocation. */
3204 Elf_Internal_Rela outrel;
3205 asection *sreloc;
3206 bfd_byte *loc;
3207 int indx;
3208
3209 outrel.r_offset = rel->r_offset
3210 + input_section->output_section->vma
3211 + input_section->output_offset;
3212 if (h != NULL && h->dynindx != -1)
3213 indx = h->dynindx;
3214 else
3215 indx = 0;
3216 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
3217 if (indx == 0)
3218 outrel.r_addend = relocation - dtpoff_base (info);
3219 else
3220 outrel.r_addend = 0;
3221 sreloc = elf_section_data (input_section)->sreloc;
3222 if (sreloc == NULL)
3223 abort ();
3224 loc = sreloc->contents;
3225 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3226 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3227 }
3228 else
3229 {
3230 BFD_ASSERT (! unresolved_reloc);
3231 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3232 contents + rel->r_offset);
3233 }
3234 continue;
3235
3236 case R_390_TLS_LDO32:
3237 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3238 relocation -= dtpoff_base (info);
3239 else
3240 /* When converting LDO to LE, we must negate. */
3241 relocation = -tpoff (info, relocation);
3242 break;
3243
3244 /* Relocations for tls instructions. */
3245 case R_390_TLS_LOAD:
3246 case R_390_TLS_GDCALL:
3247 case R_390_TLS_LDCALL:
3248 tls_type = GOT_UNKNOWN;
3249 if (h == NULL && local_got_offsets)
3250 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3251 else if (h != NULL)
3252 tls_type = elf_s390_hash_entry(h)->tls_type;
3253
3254 if (tls_type == GOT_TLS_GD)
3255 continue;
3256
3257 if (r_type == R_390_TLS_LOAD)
3258 {
3259 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3260 {
3261 /* IE->LE transition. Four valid cases:
3262 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
3263 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
3264 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
3265 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3266 unsigned int insn, ry;
3267
3268 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3269 ry = 0;
3270 if ((insn & 0xff00f000) == 0x58000000)
3271 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
3272 ry = (insn & 0x000f0000);
3273 else if ((insn & 0xff0f0000) == 0x58000000)
3274 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
3275 ry = (insn & 0x0000f000) << 4;
3276 else if ((insn & 0xff00f000) == 0x5800c000)
3277 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
3278 ry = (insn & 0x000f0000);
3279 else if ((insn & 0xff0f0000) == 0x580c0000)
3280 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3281 ry = (insn & 0x0000f000) << 4;
3282 else
3283 invalid_tls_insn (input_bfd, input_section, rel);
3284 insn = 0x18000700 | (insn & 0x00f00000) | ry;
3285 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3286 }
3287 }
3288 else if (r_type == R_390_TLS_GDCALL)
3289 {
3290 unsigned int insn;
3291
3292 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3293 if ((insn & 0xff000fff) != 0x4d000000 &&
3294 (insn & 0xffff0000) != 0xc0e50000 &&
3295 (insn & 0xff000000) != 0x0d000000)
3296 invalid_tls_insn (input_bfd, input_section, rel);
3297 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3298 {
3299 if ((insn & 0xff000000) == 0x0d000000)
3300 {
3301 /* GD->LE transition.
3302 basr rx, ry -> nopr r7 */
3303 insn = 0x07070000 | (insn & 0xffff);
3304 }
3305 else if ((insn & 0xff000000) == 0x4d000000)
3306 {
3307 /* GD->LE transition.
3308 bas %r14,0(%rx,%r13) -> bc 0,0 */
3309 insn = 0x47000000;
3310 }
3311 else
3312 {
3313 /* GD->LE transition.
3314 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
3315 insn = 0xc0040000;
3316 bfd_put_16 (output_bfd, 0x0000,
3317 contents + rel->r_offset + 4);
3318 }
3319 }
3320 else
3321 {
3322 /* If basr is used in the pic case to invoke
3323 _tls_get_offset, something went wrong before. */
3324 if ((insn & 0xff000000) == 0x0d000000)
3325 invalid_tls_insn (input_bfd, input_section, rel);
3326
3327 if ((insn & 0xff000000) == 0x4d000000)
3328 {
3329 /* GD->IE transition.
3330 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3331 insn = 0x5822c000;
3332 }
3333 else
3334 {
3335 /* GD->IE transition.
3336 brasl %r14,__tls_get_addr@plt ->
3337 l %r2,0(%r2,%r12) ; bcr 0,0 */
3338 insn = 0x5822c000;
3339 bfd_put_16 (output_bfd, 0x0700,
3340 contents + rel->r_offset + 4);
3341 }
3342 }
3343 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3344 }
3345 else if (r_type == R_390_TLS_LDCALL)
3346 {
3347 if (!bfd_link_pic (info))
3348 {
3349 unsigned int insn;
3350
3351 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3352 if ((insn & 0xff000fff) != 0x4d000000 &&
3353 (insn & 0xffff0000) != 0xc0e50000 &&
3354 (insn & 0xff000000) != 0x0d000000)
3355 invalid_tls_insn (input_bfd, input_section, rel);
3356
3357 if ((insn & 0xff000000) == 0x0d000000)
3358 {
3359 /* LD->LE transition.
3360 basr rx, ry -> nopr r7 */
3361 insn = 0x07070000 | (insn & 0xffff);
3362 }
3363 else if ((insn & 0xff000000) == 0x4d000000)
3364 {
3365 /* LD->LE transition.
3366 bas %r14,0(%rx,%r13) -> bc 0,0 */
3367 insn = 0x47000000;
3368 }
3369 else
3370 {
3371 /* LD->LE transition.
3372 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3373 insn = 0xc0040000;
3374 bfd_put_16 (output_bfd, 0x0000,
3375 contents + rel->r_offset + 4);
3376 }
3377 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3378 }
3379 }
3380 continue;
3381
3382 default:
3383 break;
3384 }
3385
3386 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3387 because such sections are not SEC_ALLOC and thus ld.so will
3388 not process them. */
3389 if (unresolved_reloc
3390 && !((input_section->flags & SEC_DEBUGGING) != 0
3391 && h->def_dynamic)
3392 && _bfd_elf_section_offset (output_bfd, info, input_section,
3393 rel->r_offset) != (bfd_vma) -1)
3394 (*_bfd_error_handler)
3395 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3396 input_bfd,
3397 input_section,
3398 (long) rel->r_offset,
3399 howto->name,
3400 h->root.root.string);
3401
3402 do_relocation:
3403
3404 /* When applying a 24 bit reloc we need to start one byte
3405 earlier. Otherwise the 32 bit get/put bfd operations might
3406 access a byte after the actual section. */
3407 if (r_type == R_390_PC24DBL
3408 || r_type == R_390_PLT24DBL)
3409 rel->r_offset--;
3410
3411 if (r_type == R_390_20
3412 || r_type == R_390_GOT20
3413 || r_type == R_390_GOTPLT20
3414 || r_type == R_390_TLS_GOTIE20)
3415 {
3416 relocation += rel->r_addend;
3417 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3418 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3419 contents, rel->r_offset,
3420 relocation, 0);
3421 }
3422 else
3423 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3424 contents, rel->r_offset,
3425 relocation, rel->r_addend);
3426
3427 if (r != bfd_reloc_ok)
3428 {
3429 const char *name;
3430
3431 if (h != NULL)
3432 name = h->root.root.string;
3433 else
3434 {
3435 name = bfd_elf_string_from_elf_section (input_bfd,
3436 symtab_hdr->sh_link,
3437 sym->st_name);
3438 if (name == NULL)
3439 return FALSE;
3440 if (*name == '\0')
3441 name = bfd_section_name (input_bfd, sec);
3442 }
3443
3444 if (r == bfd_reloc_overflow)
3445 {
3446
3447 if (! ((*info->callbacks->reloc_overflow)
3448 (info, (h ? &h->root : NULL), name, howto->name,
3449 (bfd_vma) 0, input_bfd, input_section,
3450 rel->r_offset)))
3451 return FALSE;
3452 }
3453 else
3454 {
3455 (*_bfd_error_handler)
3456 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3457 input_bfd, input_section,
3458 (long) rel->r_offset, name, (int) r);
3459 return FALSE;
3460 }
3461 }
3462 }
3463
3464 return TRUE;
3465 }
3466
3467 /* Generate the PLT slots together with the dynamic relocations needed
3468 for IFUNC symbols. */
3469
3470 static void
3471 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3472 struct bfd_link_info *info,
3473 struct elf_link_hash_entry *h,
3474 struct elf_s390_link_hash_table *htab,
3475 bfd_vma iplt_offset,
3476 bfd_vma resolver_address)
3477 {
3478 bfd_vma iplt_index;
3479 bfd_vma got_offset;
3480 bfd_vma igotiplt_offset;
3481 Elf_Internal_Rela rela;
3482 bfd_byte *loc;
3483 asection *plt, *gotplt, *relplt;
3484 bfd_vma relative_offset;
3485
3486 if (htab->elf.iplt == NULL
3487 || htab->elf.igotplt == NULL
3488 || htab->elf.irelplt == NULL)
3489 abort ();
3490
3491 gotplt = htab->elf.igotplt;
3492 relplt = htab->elf.irelplt;
3493
3494 /* Index of the PLT slot within iplt section. */
3495 iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3496 plt = htab->elf.iplt;
3497 /* Offset into the igot.plt section. */
3498 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3499 /* Offset into the got section. */
3500 got_offset = igotiplt_offset + gotplt->output_offset;
3501
3502 /* S390 uses halfwords for relative branch calc! */
3503 relative_offset = - (plt->output_offset +
3504 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3505 /* If offset is > 32768, branch to a previous branch
3506 390 can only handle +-64 K jumps. */
3507 if ( -32768 > (int) relative_offset )
3508 relative_offset
3509 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3510
3511 /* Fill in the entry in the procedure linkage table. */
3512 if (!bfd_link_pic (info))
3513 {
3514 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3515 PLT_ENTRY_SIZE);
3516
3517 /* Adjust jump to the first plt entry. */
3518 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3519 plt->contents + iplt_offset + 20);
3520
3521 /* Push the GOT offset field. */
3522 bfd_put_32 (output_bfd,
3523 (gotplt->output_section->vma
3524 + got_offset),
3525 plt->contents + iplt_offset + 24);
3526 }
3527 else if (got_offset < 4096)
3528 {
3529 /* The GOT offset is small enough to be used directly as
3530 displacement. */
3531 memcpy (plt->contents + iplt_offset,
3532 elf_s390_plt_pic12_entry,
3533 PLT_ENTRY_SIZE);
3534
3535 /* Put in the GOT offset as displacement value. The 0xc000
3536 value comes from the first word of the plt entry. Look
3537 at the elf_s390_plt_pic16_entry content. */
3538 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3539 plt->contents + iplt_offset + 2);
3540
3541 /* Adjust the jump to the first plt entry. */
3542 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3543 plt->contents + iplt_offset + 20);
3544 }
3545 else if (got_offset < 32768)
3546 {
3547 /* The GOT offset is too big for a displacement but small
3548 enough to be a signed 16 bit immediate value as it can be
3549 used in an lhi instruction. */
3550 memcpy (plt->contents + iplt_offset,
3551 elf_s390_plt_pic16_entry,
3552 PLT_ENTRY_SIZE);
3553
3554 /* Put in the GOT offset for the lhi instruction. */
3555 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3556 plt->contents + iplt_offset + 2);
3557
3558 /* Adjust the jump to the first plt entry. */
3559 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3560 plt->contents + iplt_offset + 20);
3561 }
3562 else
3563 {
3564 memcpy (plt->contents + iplt_offset,
3565 elf_s390_plt_pic_entry,
3566 PLT_ENTRY_SIZE);
3567
3568 /* Adjust the jump to the first plt entry. */
3569 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3570 plt->contents + iplt_offset + 20);
3571
3572 /* Push the GOT offset field. */
3573 bfd_put_32 (output_bfd, got_offset,
3574 plt->contents + iplt_offset + 24);
3575 }
3576 /* Insert offset into reloc. table here. */
3577 bfd_put_32 (output_bfd, relplt->output_offset +
3578 iplt_index * RELA_ENTRY_SIZE,
3579 plt->contents + iplt_offset + 28);
3580
3581 /* Fill in the entry in the global offset table.
3582 Points to instruction after GOT offset. */
3583 bfd_put_32 (output_bfd,
3584 (plt->output_section->vma
3585 + plt->output_offset
3586 + iplt_offset
3587 + 12),
3588 gotplt->contents + igotiplt_offset);
3589
3590 /* Fill in the entry in the .rela.plt section. */
3591 rela.r_offset = gotplt->output_section->vma + got_offset;
3592
3593 if (!h
3594 || h->dynindx == -1
3595 || ((bfd_link_executable (info)
3596 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3597 && h->def_regular))
3598 {
3599 /* The symbol can be locally resolved. */
3600 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3601 rela.r_addend = resolver_address;
3602 }
3603 else
3604 {
3605 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3606 rela.r_addend = 0;
3607 }
3608
3609 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3610 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3611 }
3612
3613 /* Finish up dynamic symbol handling. We set the contents of various
3614 dynamic sections here. */
3615
3616 static bfd_boolean
3617 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3618 struct bfd_link_info *info,
3619 struct elf_link_hash_entry *h,
3620 Elf_Internal_Sym *sym)
3621 {
3622 struct elf_s390_link_hash_table *htab;
3623 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3624
3625 htab = elf_s390_hash_table (info);
3626
3627 if (h->plt.offset != (bfd_vma) -1)
3628 {
3629 bfd_vma plt_index;
3630 bfd_vma got_offset;
3631 Elf_Internal_Rela rela;
3632 bfd_byte *loc;
3633 bfd_vma relative_offset;
3634
3635 /* This symbol has an entry in the procedure linkage table. Set
3636 it up. */
3637 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3638 {
3639 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3640 htab, h->plt.offset,
3641 eh->ifunc_resolver_address +
3642 eh->ifunc_resolver_section->output_offset +
3643 eh->ifunc_resolver_section->output_section->vma);
3644 /* Do not return yet. Handling of explicit GOT slots of
3645 IFUNC symbols is below. */
3646 }
3647 else
3648 {
3649 if (h->dynindx == -1
3650 || htab->elf.splt == NULL
3651 || htab->elf.sgotplt == NULL
3652 || htab->elf.srelplt == NULL)
3653 abort ();
3654
3655 /* Calc. index no.
3656 Current offset - size first entry / entry size. */
3657 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3658
3659 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3660 addr & GOT addr. */
3661 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3662
3663 /* S390 uses halfwords for relative branch calc! */
3664 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3665 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3666 /* If offset is > 32768, branch to a previous branch
3667 390 can only handle +-64 K jumps. */
3668 if ( -32768 > (int) relative_offset )
3669 relative_offset
3670 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3671
3672 /* Fill in the entry in the procedure linkage table. */
3673 if (!bfd_link_pic (info))
3674 {
3675 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3676 PLT_ENTRY_SIZE);
3677
3678 /* Adjust jump to the first plt entry. */
3679 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3680 htab->elf.splt->contents + h->plt.offset + 20);
3681
3682 /* Push the GOT offset field. */
3683 bfd_put_32 (output_bfd,
3684 (htab->elf.sgotplt->output_section->vma
3685 + htab->elf.sgotplt->output_offset
3686 + got_offset),
3687 htab->elf.splt->contents + h->plt.offset + 24);
3688 }
3689 else if (got_offset < 4096)
3690 {
3691 /* The GOT offset is small enough to be used directly as
3692 displacement. */
3693 memcpy (htab->elf.splt->contents + h->plt.offset,
3694 elf_s390_plt_pic12_entry,
3695 PLT_ENTRY_SIZE);
3696
3697 /* Put in the GOT offset as displacement value. The 0xc000
3698 value comes from the first word of the plt entry. Look
3699 at the elf_s390_plt_pic16_entry content. */
3700 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3701 htab->elf.splt->contents + h->plt.offset + 2);
3702
3703 /* Adjust the jump to the first plt entry. */
3704 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3705 htab->elf.splt->contents + h->plt.offset + 20);
3706 }
3707 else if (got_offset < 32768)
3708 {
3709 /* The GOT offset is too big for a displacement but small
3710 enough to be a signed 16 bit immediate value as it can be
3711 used in an lhi instruction. */
3712 memcpy (htab->elf.splt->contents + h->plt.offset,
3713 elf_s390_plt_pic16_entry,
3714 PLT_ENTRY_SIZE);
3715
3716 /* Put in the GOT offset for the lhi instruction. */
3717 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3718 htab->elf.splt->contents + h->plt.offset + 2);
3719
3720 /* Adjust the jump to the first plt entry. */
3721 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3722 htab->elf.splt->contents + h->plt.offset + 20);
3723 }
3724 else
3725 {
3726 memcpy (htab->elf.splt->contents + h->plt.offset,
3727 elf_s390_plt_pic_entry,
3728 PLT_ENTRY_SIZE);
3729
3730 /* Adjust the jump to the first plt entry. */
3731 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3732 htab->elf.splt->contents + h->plt.offset + 20);
3733
3734 /* Push the GOT offset field. */
3735 bfd_put_32 (output_bfd, got_offset,
3736 htab->elf.splt->contents + h->plt.offset + 24);
3737 }
3738 /* Insert offset into reloc. table here. */
3739 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3740 htab->elf.splt->contents + h->plt.offset + 28);
3741
3742 /* Fill in the entry in the global offset table.
3743 Points to instruction after GOT offset. */
3744 bfd_put_32 (output_bfd,
3745 (htab->elf.splt->output_section->vma
3746 + htab->elf.splt->output_offset
3747 + h->plt.offset
3748 + 12),
3749 htab->elf.sgotplt->contents + got_offset);
3750
3751 /* Fill in the entry in the .rela.plt section. */
3752 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3753 + htab->elf.sgotplt->output_offset
3754 + got_offset);
3755 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3756 rela.r_addend = 0;
3757 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3758 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3759
3760 if (!h->def_regular)
3761 {
3762 /* Mark the symbol as undefined, rather than as defined in
3763 the .plt section. Leave the value alone. This is a clue
3764 for the dynamic linker, to make function pointer
3765 comparisons work between an application and shared
3766 library. */
3767 sym->st_shndx = SHN_UNDEF;
3768 }
3769 }
3770 }
3771
3772 if (h->got.offset != (bfd_vma) -1
3773 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3774 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3775 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3776 {
3777 Elf_Internal_Rela rela;
3778 bfd_byte *loc;
3779
3780 /* This symbol has an entry in the global offset table. Set it
3781 up. */
3782
3783 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3784 abort ();
3785
3786 rela.r_offset = (htab->elf.sgot->output_section->vma
3787 + htab->elf.sgot->output_offset
3788 + (h->got.offset &~ (bfd_vma) 1));
3789
3790 /* If this is a static link, or it is a -Bsymbolic link and the
3791 symbol is defined locally or was forced to be local because
3792 of a version file, we just want to emit a RELATIVE reloc.
3793 The entry in the global offset table will already have been
3794 initialized in the relocate_section function. */
3795 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3796 {
3797 if (bfd_link_pic (info))
3798 {
3799 /* An explicit GOT slot usage needs GLOB_DAT. If the
3800 symbol references local the implicit got.iplt slot
3801 will be used and the IRELATIVE reloc has been created
3802 above. */
3803 goto do_glob_dat;
3804 }
3805 else
3806 {
3807 /* For non-shared objects explicit GOT slots must be
3808 filled with the PLT slot address for pointer
3809 equality reasons. */
3810 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3811 + htab->elf.iplt->output_offset
3812 + h->plt.offset),
3813 htab->elf.sgot->contents + h->got.offset);
3814 return TRUE;
3815 }
3816 }
3817 else if (bfd_link_pic (info)
3818 && SYMBOL_REFERENCES_LOCAL (info, h))
3819 {
3820 /* If this is a static link, or it is a -Bsymbolic link and
3821 the symbol is defined locally or was forced to be local
3822 because of a version file, we just want to emit a
3823 RELATIVE reloc. The entry in the global offset table
3824 will already have been initialized in the
3825 relocate_section function. */
3826 if (!h->def_regular)
3827 return FALSE;
3828 BFD_ASSERT((h->got.offset & 1) != 0);
3829 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3830 rela.r_addend = (h->root.u.def.value
3831 + h->root.u.def.section->output_section->vma
3832 + h->root.u.def.section->output_offset);
3833 }
3834 else
3835 {
3836 BFD_ASSERT((h->got.offset & 1) == 0);
3837 do_glob_dat:
3838 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3839 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3840 rela.r_addend = 0;
3841 }
3842
3843 loc = htab->elf.srelgot->contents;
3844 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3845 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3846 }
3847
3848 if (h->needs_copy)
3849 {
3850 Elf_Internal_Rela rela;
3851 bfd_byte *loc;
3852
3853 /* This symbols needs a copy reloc. Set it up. */
3854
3855 if (h->dynindx == -1
3856 || (h->root.type != bfd_link_hash_defined
3857 && h->root.type != bfd_link_hash_defweak)
3858 || htab->srelbss == NULL)
3859 abort ();
3860
3861 rela.r_offset = (h->root.u.def.value
3862 + h->root.u.def.section->output_section->vma
3863 + h->root.u.def.section->output_offset);
3864 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3865 rela.r_addend = 0;
3866 loc = htab->srelbss->contents;
3867 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3868 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3869 }
3870
3871 /* Mark some specially defined symbols as absolute. */
3872 if (h == htab->elf.hdynamic
3873 || h == htab->elf.hgot
3874 || h == htab->elf.hplt)
3875 sym->st_shndx = SHN_ABS;
3876
3877 return TRUE;
3878 }
3879
3880 /* Used to decide how to sort relocs in an optimal manner for the
3881 dynamic linker, before writing them out. */
3882
3883 static enum elf_reloc_type_class
3884 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3885 const asection *rel_sec ATTRIBUTE_UNUSED,
3886 const Elf_Internal_Rela *rela)
3887 {
3888 bfd *abfd = info->output_bfd;
3889 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3890 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3891 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
3892 Elf_Internal_Sym sym;
3893
3894 if (htab->elf.dynsym == NULL
3895 || !bed->s->swap_symbol_in (abfd,
3896 (htab->elf.dynsym->contents
3897 + r_symndx * bed->s->sizeof_sym),
3898 0, &sym))
3899 abort ();
3900
3901 /* Check relocation against STT_GNU_IFUNC symbol. */
3902 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3903 return reloc_class_ifunc;
3904
3905 switch ((int) ELF32_R_TYPE (rela->r_info))
3906 {
3907 case R_390_RELATIVE:
3908 return reloc_class_relative;
3909 case R_390_JMP_SLOT:
3910 return reloc_class_plt;
3911 case R_390_COPY:
3912 return reloc_class_copy;
3913 default:
3914 return reloc_class_normal;
3915 }
3916 }
3917
3918 /* Finish up the dynamic sections. */
3919
3920 static bfd_boolean
3921 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3922 struct bfd_link_info *info)
3923 {
3924 struct elf_s390_link_hash_table *htab;
3925 bfd *dynobj;
3926 asection *sdyn;
3927 bfd *ibfd;
3928 unsigned int i;
3929
3930 htab = elf_s390_hash_table (info);
3931 dynobj = htab->elf.dynobj;
3932 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3933
3934 if (htab->elf.dynamic_sections_created)
3935 {
3936 Elf32_External_Dyn *dyncon, *dynconend;
3937
3938 if (sdyn == NULL || htab->elf.sgot == NULL)
3939 abort ();
3940
3941 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3942 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3943 for (; dyncon < dynconend; dyncon++)
3944 {
3945 Elf_Internal_Dyn dyn;
3946 asection *s;
3947
3948 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3949
3950 switch (dyn.d_tag)
3951 {
3952 default:
3953 continue;
3954
3955 case DT_PLTGOT:
3956 s = htab->elf.sgotplt;
3957 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3958 break;
3959
3960 case DT_JMPREL:
3961 s = htab->elf.srelplt;
3962 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3963 break;
3964
3965 case DT_PLTRELSZ:
3966 s = htab->elf.srelplt;
3967 dyn.d_un.d_val = s->size;
3968 break;
3969 }
3970
3971 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3972 }
3973
3974 /* Fill in the special first entry in the procedure linkage table. */
3975 if (htab->elf.splt && htab->elf.splt->size > 0)
3976 {
3977 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3978 if (bfd_link_pic (info))
3979 {
3980 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3981 PLT_FIRST_ENTRY_SIZE);
3982 }
3983 else
3984 {
3985 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3986 PLT_FIRST_ENTRY_SIZE);
3987 bfd_put_32 (output_bfd,
3988 htab->elf.sgotplt->output_section->vma
3989 + htab->elf.sgotplt->output_offset,
3990 htab->elf.splt->contents + 24);
3991 }
3992 elf_section_data (htab->elf.splt->output_section)
3993 ->this_hdr.sh_entsize = 4;
3994 }
3995
3996 }
3997
3998 if (htab->elf.sgotplt)
3999 {
4000 /* Fill in the first three entries in the global offset table. */
4001 if (htab->elf.sgotplt->size > 0)
4002 {
4003 bfd_put_32 (output_bfd,
4004 (sdyn == NULL ? (bfd_vma) 0
4005 : sdyn->output_section->vma + sdyn->output_offset),
4006 htab->elf.sgotplt->contents);
4007 /* One entry for shared object struct ptr. */
4008 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
4009 /* One entry for _dl_runtime_resolve. */
4010 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
4011 }
4012
4013 elf_section_data (htab->elf.sgotplt->output_section)
4014 ->this_hdr.sh_entsize = 4;
4015 }
4016 /* Finish dynamic symbol for local IFUNC symbols. */
4017 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
4018 {
4019 struct plt_entry *local_plt;
4020 Elf_Internal_Sym *isym;
4021 Elf_Internal_Shdr *symtab_hdr;
4022
4023 symtab_hdr = &elf_symtab_hdr (ibfd);
4024
4025 local_plt = elf_s390_local_plt (ibfd);
4026 if (local_plt != NULL)
4027 for (i = 0; i < symtab_hdr->sh_info; i++)
4028 {
4029 if (local_plt[i].plt.offset != (bfd_vma) -1)
4030 {
4031 asection *sec = local_plt[i].sec;
4032 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
4033 if (isym == NULL)
4034 return FALSE;
4035
4036 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4037 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
4038 local_plt[i].plt.offset,
4039 isym->st_value
4040 + sec->output_section->vma
4041 + sec->output_offset);
4042
4043 }
4044 }
4045 }
4046 return TRUE;
4047 }
4048
4049 static bfd_boolean
4050 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
4051 {
4052 int offset;
4053 unsigned int size;
4054
4055 switch (note->descsz)
4056 {
4057 default:
4058 return FALSE;
4059
4060 case 224: /* S/390 Linux. */
4061 /* pr_cursig */
4062 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
4063
4064 /* pr_pid */
4065 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
4066
4067 /* pr_reg */
4068 offset = 72;
4069 size = 144;
4070 break;
4071 }
4072
4073 /* Make a ".reg/999" section. */
4074 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
4075 size, note->descpos + offset);
4076 }
4077
4078 /* Return address for Ith PLT stub in section PLT, for relocation REL
4079 or (bfd_vma) -1 if it should not be included. */
4080
4081 static bfd_vma
4082 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
4083 const arelent *rel ATTRIBUTE_UNUSED)
4084 {
4085 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
4086 }
4087
4088 /* Merge backend specific data from an object file to the output
4089 object file when linking. */
4090
4091 static bfd_boolean
4092 elf32_s390_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4093 {
4094 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
4095 return TRUE;
4096
4097 if (!elf_s390_merge_obj_attributes (ibfd, obfd))
4098 return FALSE;
4099
4100 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
4101 return TRUE;
4102 }
4103
4104
4105 #define TARGET_BIG_SYM s390_elf32_vec
4106 #define TARGET_BIG_NAME "elf32-s390"
4107 #define ELF_ARCH bfd_arch_s390
4108 #define ELF_TARGET_ID S390_ELF_DATA
4109 #define ELF_MACHINE_CODE EM_S390
4110 #define ELF_MACHINE_ALT1 EM_S390_OLD
4111 #define ELF_MAXPAGESIZE 0x1000
4112
4113 #define elf_backend_can_gc_sections 1
4114 #define elf_backend_can_refcount 1
4115 #define elf_backend_want_got_plt 1
4116 #define elf_backend_plt_readonly 1
4117 #define elf_backend_want_plt_sym 0
4118 #define elf_backend_got_header_size 12
4119 #define elf_backend_rela_normal 1
4120
4121 #define elf_info_to_howto elf_s390_info_to_howto
4122
4123 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
4124 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
4125 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4126 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4127
4128 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
4129
4130 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4131 #define elf_backend_check_relocs elf_s390_check_relocs
4132 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4133 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
4134 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4135 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4136 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4137 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
4138 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4139 #define elf_backend_relocate_section elf_s390_relocate_section
4140 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4141 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4142 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4143 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4144 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
4145 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4146
4147 #define bfd_elf32_mkobject elf_s390_mkobject
4148 #define elf_backend_object_p elf_s390_object_p
4149
4150 #include "elf32-target.h"
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